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Quantum versus classical nature of the low-temperature magnetic phase transition in TbAl3(BO3)4 / T. Zajarniuk, A. Szewczyk, M. U. Gutowska [et al.] // Phys. Rev. B. - 2022. - Vol. 105, Is. 9. - Ст. 094418, DOI 10.1103/PhysRevB.105.094418. - Cited References: 26. - This work was supported partially by the National Science Centre (NCN) , Poland, under Project No. 2018/31/B/ST3/03289 . - ISSN 2469-9950. - ISSN 2469-9969

РУБ Materials Science, Multidisciplinary + Physics, Applied + Physics, Condensed
Рубрики:
GROWTH
FIELD
HEAT
Аннотация: Specific heat CB of a TbAl3(BO3)4 crystal was studied for 50 mK T 300 K with emphasis on T 1 K where a phase transition was found at Tc

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Держатели документа:
Polish Acad Sci, Inst Phys, Aleja Lotnikow 32-46, PL-02668 Warsaw, Poland.
Polish Acad Sci, Inst Low Temp & Struct Res, Ulica Okolna 2, PL-50422 Wroclaw, Poland.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Natl Acad Sci Ukraine, B Verkin Inst Low Temp Phys & Engn, 47 Nauky Ave, UA-61103 Kharkiv, Ukraine.
Czech Acad Sci, Inst Phys, Cukrovarnicka 10, Prague 16200 6, Czech Republic.
Adam Mickiewicz Univ, Fac Phys, Uniwersytetu Poznanskiego 2, PL-61614 Poznan, Poland.

Доп.точки доступа:
Zajarniuk, T.; Szewczyk, A.; Gutowska, M. U.; Puzniak, R.; Szymczak, H.; Gudim, I. A.; Гудим, Ирина Анатольевна; Bedarev, V. A.; Pashchenko, M., I; Tomczak, P.; Szuszkiewicz, W.
}
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Asymmetric interfaces in epitaxial off-stoichiometric Fe3+xSi1-x/Ge/Fe3+xSi1-x hybrid structures: Effect on magnetic and electric transport properties / A. S. Tarasov, I. A. Tarasov, I. A. Yakovlev [et al.] // Nanomaterials. - 2022. - Vol. 12, Is. 1. - Ст. 131, DOI 10.3390/nano12010131. - Cited References: 61. - The research was funded by RFBR, Krasnoyarsk Territory, and Krasnoyarsk Regional Fund of Science, project number 20-42-243007, and by the Government of the Russian Federation, Mega Grant for the Creation of Competitive World-Class Laboratories (Agreement no. 075-15-2019-1886). I.A.T. and S.N.V. thank RFBR, Krasnoyarsk Territory, and Krasnoyarsk Regional Fund of Science, project number 20-42-240012, for partial work related to the development of the simulation model of the pore autocorrelated radial distribution function coupled with the near coincidence site model, the Fe3+xSi1-x lattice distortion analysis, and processing Rutherford backscattering spectroscopy data. The Rutherford backscattering spectroscopy measurements were supported by the Ministry of Science and Higher Education of the Russian Federation (project FZWN-2020-0008) . - ISSN 2079-4991

РУБ Chemistry, Multidisciplinary + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
FILMS
   ANISOTROPY
   SI(001)
   DEVICES
   SURFACE
   GROWTH
Кл.слова (ненормированные):
iron silicide -- germanium -- molecular beam epitaxy -- epitaxial stress -- lattice distortion -- dislocation lattices -- FMR -- Rutherford backscattering -- spintronics
Аннотация: Three-layer iron-rich Fe3+xSi1-x/Ge/Fe3+xSi1-x (0.2 < x < 0.64) heterostructures on a Si(111) surface with Ge thicknesses of 4 nm and 7 nm were grown by molecular beam epitaxy. Systematic studies of the structural and morphological properties of the synthesized samples have shown that an increase in the Ge thickness causes a prolonged atomic diffusion through the interfaces, which significantly increases the lattice misfits in the Ge/Fe3+xSi1-x heterosystem due to the incorporation of Ge atoms into the Fe3+xSi1-x bottom layer. The resultant lowering of the total free energy caused by the development of the surface roughness results in a transition from an epitaxial to a polycrystalline growth of the upper Fe3+xSi1-x. The average lattice distortion and residual stress of the upper Fe3+xSi1-x were determined by electron diffraction and theoretical calculations to be equivalent to 0.2 GPa for the upper epitaxial layer with a volume misfit of -0.63% compared with a undistorted counterpart. The volume misfit follows the resultant interatomic misfit of |0.42|% with the bottom Ge layer, independently determined by atomic force microscopy. The variation in structural order and morphology significantly changes the magnetic properties of the upper Fe3+xSi1-x layer and leads to a subtle effect on the transport properties of the Ge layer. Both hysteresis loops and FMR spectra differ for the structures with 4 nm and 7 nm Ge layers. The FMR spectra exhibit two distinct absorption lines corresponding to two layers of ferromagnetic Fe3+xSi1-x films. At the same time, a third FMR line appears in the sample with the thicker Ge. The angular dependences of the resonance field of the FMR spectra measured in the plane of the film have a pronounced easy-axis type anisotropy, as well as an anisotropy corresponding to the cubic crystal symmetry of Fe3+xSi1-x, which implies the epitaxial orientation relationship of Fe3+xSi1-x (111)[0-11] || Ge(111)[1-10] || Fe3+xSi1-x (111)[0-11] || Si(111)[1-10]. Calculated from ferromagnetic resonance (FMR) data saturation magnetization exceeds 1000 kA/m. The temperature dependence of the electrical resistivity of a Ge layer with thicknesses of 4 nm and 7 nm is of semiconducting type, which is, however, determined by different transport mechanisms.

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Держатели документа:
RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
RAS, Fed Res Ctr KSC SB, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia.
RAS, Boreskov Inst Catalysis SB, Synchrotron Radiat Facil SKIF, Nikolskiy Prospekt 1, Koltsov 630559, Russia.
Immanuel Kant Balt Fed Univ, REC Smart Mat & Biomed Applicat, Kaliningrad 236041, Russia.
Immanuel Kant Balt Fed Univ, REC Funct Nanomat, Kaliningrad 236016, Russia.
Univ Duisburg Essen, Fac Phys, D-47057 Duisburg, Germany.
Univ Duisburg Essen, Ctr Nanointegrat, D-47057 Duisburg, Germany.

Доп.точки доступа:
Tarasov, A. S.; Тарасов, Антон Сергеевич; Tarasov, I. A.; Тарасов, Иван Анатольевич; Yakovlev, I. A.; Яковлев, Иван Александрович; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Bondarev, I. A.; Бондарев, Илья Александрович; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Platunov, M. S.; Платунов, Михаил Сергеевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Efimov, Dmitriy D.; Goikhman, Aleksandr Yu.; Belyaev, B. A.; Беляев, Борис Афанасьевич; Baron, F. A.; Барон, Филипп Алексеевич; Shanidze, Lev V.; Шанидзе, Лев Викторович; Farle, M.; Фарле, Михаель; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Volkov, N. V.; Волков, Никита Валентинович; RFBRRussian Foundation for Basic Research (RFBR); Krasnoyarsk Regional Fund of Science [20-42-243007, 20-42-240012]; Government of the Russian Federation [075-15-2019-1886]; Ministry of Science and Higher Education of the Russian Federation [FZWN-2020-0008]
}
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Solovev, P. N.
Numerical study of structural and magnetic properties of thin films obliquely deposited on rippled substrates / P. N. Solovev, A. V. Izotov, B. A. Belyaev // J. Phys.: Condens. Matter. - 2021. - Vol. 33, Is. 49. - Ст. 495802, DOI 10.1088/1361-648X/ac26fc. - Cited References: 35. - The reported study was funded by RFBR, the Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund and JSC 'NPP Radiosviaz', Project Number 20-42-242901 . - ISSN 0953-8984. - ISSN 1361-648X

РУБ Physics, Condensed Matter
Рубрики:
SIMULATION
ANISOTROPY
GROWTH
Кл.слова (ненормированные):
oblique deposition -- micromagnetic simulation -- thin film growth simulation -- rippled substrate -- magnetic anisotropy -- magnetization reversal
Аннотация: Structural modulation in thin films plays a substantial role in the formation of their magnetic properties. By producing topographic patterns in thin films, it is possible to engineer their magnetic response. Here, we report on the numerical study of the relationship between structural and static magnetic properties of thin films obliquely deposited on substrates with the sinusoidal surface. 3D Monte Carlo film growth simulations show that, under certain deposition conditions, an inhomogeneous columnar morphology can form in the films caused by the shadowing effect and the rippled substrate. Calculations of the demagnetizing tensors for these films demonstrate that their columnar structure is the source of the shape-induced uniaxial magnetic anisotropy that varies nonmonotonically with the deposition angle. Micromagnetic simulations of the generated films confirm the uniaxial character of the shape-induced anisotropy, and also show that magnetization reversal occurs via an incoherent rotation of magnetic moments.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, 50-38 Akademgorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, 79 Svobodny Pr, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Izotov, A. V.; Изотов, Андрей Викторович; Belyaev, B. A.; Беляев, Борис Афанасьевич; Соловьев, Платон Николаевич; RFBRRussian Foundation for Basic Research (RFBR); Government of Krasnoyarsk Territory; Krasnoyarsk Regional Fund; JSC 'NPP Radiosviaz' [20-42-242901]
}
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    Cu-doped TiNxOy thin film resistors DC/RF performance and reliability / L. V. Shanidze, A. S. Tarasov, M. V. Rautskiy [et al.] // Appl. Sci. - 2021. - Vol. 11, Is. 16. - Ст. 7498, DOI 10.3390/app11167498. - Cited References: 13. - This research was funded by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, project code 20-42-240013 and by Grant of the Government of the Russian Federation for Creation ofWorld Tier Laboratories (contract No. 075-15-2019-1886) . - ISSN 2076-3417
   Перевод заглавия: Производительность и надежность тонкопленочных резисторов TiNxOy, легированных медью

РУБ Chemistry, Multidisciplinary + Engineering, Multidisciplinary + Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
GROWTH
Кл.слова (ненормированные):
high-frequency passive components -- high power density -- thin film -- copper doped titanium oxynitride -- non-linear -- resistors -- heterogeneous integration
Аннотация: We fabricated Cu-doped TiNxOy thin film resistors by using atomic layer deposition, optical lithography, dry etching, Ti/Cu/Ti/Au e-beam evaporation and lift-off processes. The results of the measurements of the resistance temperature dependence, non-linearity, S-parameters at 0.01–26 GHz and details of the breakdown mechanism under high-voltage stress are reported. The devices’ sheet resistance is 220 ± 8 Ω/□ (480 ± 20 µΩ*cm); intrinsic resistance temperature coefficient (TCR) is ~400 ppm/°C in the T-range of 10–300 K; and S-parameters versus frequency are flat up to 2 GHz with maximum variation of 10% at 26 GHz. The resistors can sustain power and current densities up to ~5 kW*cm−2 and ~2 MA*cm−2, above which they switch to high-resistance state with the sheet resistance equal to ~200 kΩ/□ (~0.4 Ω*cm) caused by nitrogen and copper desorption from TiNxOy film. The Cu/Ti/TiNxOy contact is prone to ageing due to gradual titanium oxidation while the TiNxOy resistor body is stable. The resistors have strong potential for applications in high-frequency integrated and hybrid circuits that require small-footprint, medium-range resistors of 0.05–10 kΩ, with small TCR and high-power handling capability.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Dept Radio Elect, Krasnoyarsk 660041, Russia.
Reshetnev Siberian State Univ Sci & Technol, Inst Space Technol, Krasnoyarsk 660037, Russia.

Доп.точки доступа:
Shanidze, L. V.; Шанидзе, Лев Викторович; Tarasov, A. S.; Тарасов, Антон Сергеевич; Rautskiy, M. V.; Рауцкий, Михаил Владимирович; Zelenov, F. V.; Konovalov, S. O.; Nemtsev, I. V.; Немцев, Иван Васильевич; Voloshin, A. S.; Волошин, Александр Сергеевич; Tarasov, I. A.; Тарасов, Иван Анатольевич; Baron, F. A.; Барон, Филипп Алексеевич; Volkov, N. V.; Волков, Никита Валентинович; RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science [20-42-240013]; Government of the Russian Federation for Creation ofWorld Tier Laboratories [075-15-2019-1886]
}
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Synthesis, crystal structure, and thermodynamic properties of CuSm2Ge2O8 / L. T. Denisova, M. S. Molokeev, Y. F. Kargin [et al.] // Russ. J. Inorg. Chem. - 2021. - Vol. 66, Is. 12. - P. 1817-1821, DOI 10.1134/S0036023621120020. - Cited References: 30. - This work was carried out with partial financial support within the framework of the State assignment for science of the Siberian Federal University, project number FSRZ2020-0013 . - ISSN 0036-0236. - ISSN 1531-8613

РУБ Chemistry, Inorganic & Nuclear
Рубрики:
TEMPERATURE HEAT-CAPACITY
   CU-O
   PREDICTION
   GERMANATES
   GROWTH
Кл.слова (ненормированные):
copper samarium germanate -- crystal structure -- high-temperature heat capacity -- thermodynamic functions
Аннотация: Copper samarium germanate CuSm2Ge2O8 have been synthesized by the ceramic method from CuO, Sm2O3, and GeO2 in air at the final calcination temperature 1273 K (200 h), and its crystal structure has been determined (space group Cm; a = 9.7592(2) Å, b = 15.2608(4) Å, c = 8.2502(2) Å, β = 148.2566(8)°, V = 646.46(3) Å3). The temperature dependence of the molar heat capacity Cp = f(T) measured in the temperature range 350–1000 K shows a maximum at Tmax = 498.5 K caused by the phase transition. Thermodynamic properties have been calculated from experimental data.

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Публикация на русском языке Синтез, кристаллическая структура и термодинамические свойства CuSm2Ge2O8 [Текст] / Л. Т. Денисова, М. С. Молокеев, Ю. Ф. Каргин [и др.] // Журн. неорг. химии. - 2021. - Т. 66 № 12. - С. 1700-1705

Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Baikov Inst Met & Mat Sci, Moscow 119991, Russia.

Доп.точки доступа:
Denisova, L. T.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Kargin, Yu F.; Irtyugo, L. A.; Belousova, N., V; Denisov, V. M.; Siberian Federal University [FSRZ2020-0013]
}
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Electronic band structures of NdFe3(BO3)4 and NdGa3(BO3)4 crystals: ab initio calculations / S. Krylova, I. Gudim, A. Aleksandrovsky [et al.] // Ferroelectrics. - 2021. - Vol. 575, Is. 1. - P. 11-17, DOI 10.1080/00150193.2021.1888219. - Cited References: 27. - This work was supported by the Russian Foundation for Basic Research Grant No. 20-42-240009 . - ISSN 0015-0193. - ISSN 1563-5112

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
HOFE3(BO3)4
   TEMPERATURE
   SPECTRA
   GROWTH
Кл.слова (ненормированные):
Borates -- ab initio calculation -- electronic bands -- crystal structure
Аннотация: NdFe3(BO3)4 and NdGa3(BO3)4 crystals are of great interest due to their physical properties. For example, NdFe3(BO3)4 crystal demonstrates magnetodielectric and magnetopiezoelectric effects, and NdGa3(BO3)4 crystal possesses luminescent and nonlinear optical properties. In this work, the properties of these materials are calculated by the plane-wave pseudo-potential method based on density functional theory. The structures of the crystals are optimized. The electronic structure of NdFe3(BO3)4 and NdGa3(BO3)4 are calculated.

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Держатели документа:
Kirensky Inst Phys FRC KSC SB RAS, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Krylova, S. N.; Крылова, Светлана Николаевна; Gudim, I. A.; Гудим, Ирина Анатольевна; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Krylov, A. S.; Крылов, Александр Сергеевич; Russian Foundation for Basic Research GrantRussian Foundation for Basic Research (RFBR) [20-42-240009]
}
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Magneto-optical parameter Q for structures with uniaxial optical anisotropy / O. A. Maximova, S. A. Lyaschenko, S. N. Varnakov, S. G. Ovchinnikov // J. Exp. Theor. Phys. - 2021. - Vol. 133, Is. 5. - P. 581-590, DOI 10.1134/S1063776121110030. - Cited References: 42. - This study was supported by the Russian Science Foundation (project no. 21-12-00226) . - ISSN 1063-7761. - ISSN 1090-6509

РУБ Physics, Multidisciplinary
Рубрики:
THIN-FILMS
ELLIPSOMETRY
GROWTH
Аннотация: This paper is devoted to the development of reflection magneto-optical ellipsometry. We have solved the inverse problem for structures with uniaxial optical anisotropy: have determined the reflection coefficients for the ambient-sample interface, and have derived an analytic expression for magneto-optical parameter Q proportional to the magnetization. This expression makes it possible to determine parameter Q exclusively from experimental data obtained using magneto-optical ellipsometry. We present a detailed algorithm for performing experiment on determining the dielectric tensor in the transverse geometry.

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Публикация на русском языке Магнитооптический параметр Q для структур с одноосной оптической анизотропией [Текст] / О. А. Максимова, С. А. Лященко, С. Н. Варнаков, С. Г. Овчинников // Журн. эксперим. и теор. физ. - 2021. - Т. 160 Вып. 5. - С. 678-688

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Fed Res Ctr,Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Maximova, O. A.; Максимова, Ольга Александровна; Lyashchenko, S. A.; Лященко, Сергей Александрович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Science FoundationRussian Science Foundation (RSF) [21-12-00226]
}
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Temperature dependence of the spontaneous polarization, acoustic and strain anomalies in strontium barium niobate crystals of different chemical compositions probed by the second harmonic generation technique / A. M. Pugachev, I. V. Zaytseva, V. K. Malinovsky [et al.] // Ferroelectrics. - 2020. - Vol. 560, Is. 1. - P. 54-60, DOI 10.1080/00150193.2020.1722883. - Cited References: 19. - This work was supported by the Russian Foundation for Basic Research, projects no. 18-02-00399 and 19-42-543-016 and State assignment No AAAA-A17-117052410033-9. . - ISSN 0015-0193. - ISSN 1563-5112

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
SINGLE-CRYSTALS
RELAXOR
GROWTH
Кл.слова (ненормированные):
SBN-x crystals -- polar regions -- ferroelectric phase transition -- second harmonic generation -- Brillouin spectroscopy
Аннотация: In SrxBa1-xNb2O6 crystals (x = 0.33, 0.5, 0.61, and 0.75), temperature dependences of spontaneous polarization, strain, elastic modules, and second harmonic generation (SHG) signal are compared. It is revealed that SHG describes the temperature dependences of dipole moments in polar nanoregions in paraelectric phase. In the vicinity of the phase transition in paraelectric phase, SHG reflects the temperature behavior of relatively large and long-lived polar asymmetric regions as indicated by the presence of the intermediate temperature range on the temperature dependence of this nonlinear response.

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Держатели документа:
Russian Acad Sci, Inst Automat & Electrometry, Novosibirsk, Russia.
Kirensky Inst Phys Fed Res Ctr KSC SB RAS, Krasnoyarsk, Russia.
Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk, Russia.
Russian Acad Sci, Prokhorov Gen Phys Inst, Moscow, Russia.

Доп.точки доступа:
Pugachev, A. M.; Zaytseva, I., V; Malinovsky, V. K.; Surovtsev, N., V; Gorev, M. V.; Горев, Михаил Васильевич; Ivleva, L. I.; Lykov, P. A.; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-02-00399, 19-42-543-016, AAAA-A17-117052410033-9]
}
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Prediction of orientation relationships and interface structures between α-, β-, γ-FeSi2 and Si phases / M. A. Visotin, I. A. Tarasov, A. S. Fedorov [et al.] // Acta Crystallogr. B. - 2020. - Vol. 76. - P. 469-482, DOI 10.1107/S2052520620005727. - Cited References: 85. - The following funding is acknowledged: Russian Science Foundation (grant No. 16-13-00060-Pi). . - ISSN 2052-5206

РУБ Chemistry, Multidisciplinary + Crystallography
Рубрики:
THERMAL-EXPANSION
   BETA-FESI2 FILMS
   GROWTH
   SILICON
   DIFFRACTION
Кл.слова (ненормированные):
interface structure -- structure prediction -- orientation relationship -- near-coincidence site -- edge-to-edge matching -- iron silicide -- DFT calculations -- thermal expansion
Аннотация: A pure crystallogeometrical approach is proposed for predicting orientation relationships, habit planes and atomic structures of the interfaces between phases, which is applicable to systems of low-symmetry phases and epitaxial thin film growth. The suggested models are verified with the example of epitaxial growth of α-, γ- and β-FeSi2 silicide thin films on silicon substrates. The density of near-coincidence sites is shown to have a decisive role in the determination of epitaxial thin film orientation and explains the superior quality of β-FeSi2 thin grown on Si(111) over Si(001) substrates despite larger lattice misfits. Ideal conjunctions for interfaces between the silicide phases are predicted and this allows for utilization of a thin buffer α-FeSi2 layer for oriented growth of β-FeSi2 nanostructures on Si(001). The thermal expansion coefficients are obtained within quasi-harmonic approximation from the DFT calculations to study the influence of temperature on the lattice strains in the derived interfaces. Faster decrease of misfits at the α-FeSi2(001)||Si(001) interface compared to γ-FeSi2(001)||Si(001) elucidates the origins of temperature-driven change of the phase growing on silicon substrates. The proposed approach guides from bulk phase unit cells to the construction of the interface atomic structures and appears to be a powerful tool for the prediction of interfaces between arbitrary phases for subsequent theoretical investigation and epitaxial film synthesis.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Visotin, M. A.; Высотин, Максим Александрович; Tarasov, I. A.; Тарасов, Иван Анатольевич; Fedorov, A. S.; Федоров, Александр Семенович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Science FoundationRussian Science Foundation (RSF) [16-13-00060-Pi]
}
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10.

Altunin, R. R.
Effect of the structural properties on the electrical resistivity of the Al/Ag thin films during the solid-state reaction / R. R. Altunin, E. T. Moiseenko, S. M. Zharkov // Phys. Solid State. - 2020. - Vol. 62, Is. 4. - P. 708-713, DOI 10.1134/S1063783420040034. - Cited References: 43. - This study was supported by the Russian Science Foundation, project no. 18-13-00080. . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
LIGHT-EMITTING-DIODES
   PHASE-FORMATION
   AG
   AL
   DIFFUSION
   SUPPRESSION
   INTERFACE
   SURFACE
   GROWTH
   HEAT
Кл.слова (ненормированные):
thin films -- phase formation -- Al/Ag -- solid-state reaction; -- electron diffraction -- resistivity
Аннотация: Based on the results of in situ electron diffraction study of the solid-state reaction and electrical resistivity measurements on the Al/Ag thin films with an atomic ratio of Al : Ag = 1 : 3, the temperature of the reaction onset has been established and a model of the structural phase transitions has been proposed. The solid-state reaction begins at 70°C with the formation of the Al–Ag solid solution at the interface between the aluminum and silver nanolayers. It has been found that, in the course of the reaction, the intermetallic compounds γ-Ag2Al → μ-Ag3Al are successively formed. It is shown that the possibility of the formation of the μ‑Ag3Al phase during the solid-state reaction in the Al/Ag thin films depends on the aluminum-to-silver ratio, while the formation of the μ-Ag3Al phase begins only after all fcc aluminum has reacted.

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Публикация на русском языке Алтунин Р. Р. Влияние структурных свойств на электросопротивление тонких пленок Al/Ag в процессе твердофазной реакции [Текст] / Р. Р. Алтунин, Е. Т. Моисеенко, С. М. Жарков // Физ. тверд. тела. - 2020. - Т. 62 Вып. 4. - С. 621-626

Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Moiseenko, E. T.; Zharkov, S. M.; Жарков, Сергей Михайлович; Russian Science FoundationRussian Science Foundation (RSF) [18-13-00080]
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11.

High-resolution optical spectroscopy and modeling of spectral and magnetic properties of multiferroic ErFe3(BO3)4 / M. N. Popova, E. P. Chukalina, D. S. Erofeev [et al.] // Phys. Rev. B. - 2020. - Vol. 101, Is. 20. - Ст. 205108, DOI 10.1103/PhysRevB.101.205108. - Cited References: 38. - Financial support of the Russian Science Foundation under Grant No. 19-12-00413 is acknowledged. . - ISSN 2469-9950. - ISSN 2469-9969

РУБ Materials Science, Multidisciplinary + Physics, Applied + Physics, Condensed Matter
Рубрики:
F-F TRANSITIONS
   ENERGY-LEVELS
   ER3+ IONS
   GROWTH
Аннотация: We carried out the high-resolution broadband temperature-dependent polarized optical spectroscopy and theoretical studies of ErFe3(BO3)4 single crystals in the paramagnetic and antiferromagnetic (T˂TN=39K) phases. On the basis of the experimentally determined 45 crystal-field (CF) levels of Er3+ ions at sites with the C2 point symmetry, CF calculations were performed, a set of physically grounded CF parameters was obtained and used to model the temperature dependences of the Er magnetic moments measured in neutron-scattering experiments, as well as the magnetic susceptibility and magnetization of the compound; the contributions of the quasi-one-dimensional iron magnetic subsystem were calculated in the frame of the previously developed self-consistent four-particle cluster model. The modeling strongly supports an easy-plane collinear structure of iron magnetic moments and excludes earlier proposed additional magnetic phase.

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Держатели документа:
Russian Acad Sci, Inst Spect, Moscow 108840, Russia.
Natl Res Univ, Moscow Inst Phys & Technol, Dolgoprudnyi 141701, Moscow Region, Russia.
LV Kirenskii Inst Phys, Siberian Branch RAS, Krasnoyarsk 660036, Russia.
Kazan Fed Univ, Kazan 420008, Russia.

Доп.точки доступа:
Popova, M. N.; Chukalina, E. P.; Erofeev, D. S.; Jablunovskis, A.; Gudim, I. A.; Гудим, Ирина Анатольевна; Malkin, B. Z.; Russian Science FoundationRussian Science Foundation (RSF) [19-12-00413]
}
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12.

    Synthesis, structure and properties of K2(1-x)Rb2xAl2B2O7 and Cs1.39Tl0.61Al2B2O7 borates as the basis for preparing new oxide materials / V. G. Grossman [et al.] // Lett. Mater. - 2019. - Vol. 9, Is. 1. - P. 86-90 ; Письма о материалах, DOI 10.22226/2410-3535-2019-1-86-90. - Cited References:22. - The research was carried out within the state assignment of FASO of Russia (Theme No 0339-2016-0007). . - ISSN 2218-5046. - ISSN 2410-3535
   Перевод заглавия: Синтез, структура и свойства боратов K2(1-x)Rb2xAl2B2O7 и Cs1.39Tl0.61Al2B2O7 как основа получения новых оксидных материалов

РУБ Materials Science, Multidisciplinary
Рубрики:
OPTICAL-PROPERTIES
   CRYSTAL-STRUCTURE
   K2Al2B2O7
   GROWTH
Кл.слова (ненормированные):
borate -- solid-phase synthesis -- optical properties -- борат -- твердофазный синтез -- оптические свойства
Аннотация: With the development of technology, the need for highly efficient functional materials is steadily increasing. Currently, borates attract the attention of researchers, as they are promising nonlinear materials. Potassium rubidium aluminum borate based on potassium aluminum borate (trigonal syngony, space group P321, Z = 3) was obtained by solid-phase synthesis. The individuality and purity of the borates were confirmed by X-ray diffraction. Analysis of differential scanning calorimetry and thermogravimetric method for K2(1‑x)Rb2xAl2B2O7 (x = 0.1– 0.8) was performed in the temperature range of 25–1075°С. Potassium rubidium borates decompose in the temperature range of 900 –1000°C. Differential scanning calorimetry, dielectric loss tangent, and second-harmonic generation data revealed phase transitions for K0.6Rb1.4Al2B2O7. A significant SHG effect was found at room temperature for K0.6Rb1.4Al2B2O7 (Q = 70). Then the SHG effect increases to Q = 85 at a temperature of 645°C and remains constant with a further increase in temperature. The new triple borate Cs1.39Tl0.61Al2B2O7 was synthesized by the solid-phase synthesis, and its crystallographic parameters were obtained by the Rietveld method. This borate crystallizes in the monoclinic space group P21 / c with the unit cell parameters: Z = 2, a = 6.6669(3) Å, b = 7.2991(3) Å , c = 9.3589(4) Å , β =116.6795(18)°, V = 406.94(3) Å 3. The structure can be considered to be built up from the nearly planar [Al2B2O10] rings, which are composed of two AlO4 tetrahedra and two BO3 triangles, connected, alternately to each other by corner-sharing.
С развитием технологии потребность в высокоэффективных функциональных материалах растет. В настоящее время бораты привлекают внимание исследователей, поскольку они являются перспективными нелинейными материалами. Твердофазным синтезом получены бораты K2(1-x)Rb2xAl2B2O7 (x = 0.1–0.8) на основе калий-алюминиевого бората (тригональная сингония, пространственная группа P321, Z = 3). Индивидуальность и чистота боратов подтверждена рентгеновской дифракцией. Анализ дифференциально-сканирующей калориметрией и термогравиметрическим методом для K2(1-x)Rb2xAl2B2O7 (x = 0.1–0.8) был проведен в интервале температур 25–1075 ºС. Калий-рубидиевые бораты разлагаются в интервале температур 900–1000 °C. Дифференциальной сканирующей калориметрией, диэлектрическими измерениями и методом генерации второй оптической гармоники выявлены фазовые переходы для K0.6Rb1.4Al2B2O7. Значительный ГВГ-эффект был обнаружен при комнатной температуре для K0.6Rb1.4Al2B2O7 (Q = 70). Эффект генерации второй гармоники возрастает до Q = 85 при температуре 645 °C и остается постоянным при дальнейшем увеличении температуры. Новый тройной борат Cs1.39Tl0.61Al2B2O7 был синтезирован методом твердофазного синтеза, а его кристаллографические параметры были получены с помощью метода Ритвельда. Этот борат кристаллизуется в моноклинной пространственной группе P21/c с параметрами элементарной ячейки: Z = 2, a = 6.6669 (3) Å, b = 7.2991 (3) Å, c = 9.3589 (4) Å, β = 116.6795 (18)º, V = 406.94 (3) Å3. Структуру можно представить в виде почти плоских колец [Al2B2O10], которые состоят из двух тетраэдров AlO4 и двух BO3 треугольников, соединенных попеременно друг с другом посредством вершин.

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Держатели документа:
RAS, Baikal Inst Nat Management, Siberian Branch, 6 Sakhyanova St, Ulan Ude 670047, Russia.
Lomonosov Moscow State Univ, GSP 1,1-3 Leninskie Gory, Moscow 119991, Russia.
RAS, Siberian Branch, Kirensky Inst Phys, Fed Res Ctr KSC, 50-38 Akademgorodok, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, 82 Svobodniy Av, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Grossman, V. G.; Гроссман В. Г.; Bazarov, B. G.; Базаров Б. Г.; Stefanovich, S. Y.; Стефанович С. Ю.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Bazarova, J. G.; Базарова Ж. Г.; [0339-2016-0007]

}
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13.

Effect of epitaxial alignment on electron transport from quasi-two-dimensional iron silicide α-FeSi2 nanocrystals into p-Si(001) / I. A. Tarasov [et al.] // Semiconductors. - 2018. - Vol. 52: 25th International Symposium on Nanostructures - Physics and Technology (Jun 26-30, 2017, Saint Petersburg, Russia), Is. 5. - P. 654-659, DOI 10.1134/S1063782618050330. - Cited References:31. - The work was supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research projects no. 16-42-243060 and 16-42-243035 and Russian Foundation for Basic Research, Government of the Republic of Khakassia, research project no. 17-42-190308. We also thank L.A. Solovyov for his assistance in XRD analysis. . - ISSN 1063-7826. - ISSN 1090-6479

РУБ Physics, Condensed Matter
Рубрики:
BETA-FESI2 THIN-FILMS
   LOW-TEMPERATURE
   GROWTH
   FESI2
   SI(100)
   SI(111)
Аннотация: Self-assembled growth of α-FeSi2 nanocrystal ensembles on gold-activated and gold-free Si(001) surface by molecular beam epitaxy is reported. The microstructure and basic orientation relationship (OR) between the silicide nanocrystals and silicon substrate were analysed. The study reveals that utilisation of the gold as catalyst regulates the preferable OR of the nanocrystals with silicon and their habitus. It is shown that electron transport from α-FeSi2 phase into p-Si(001) can be tuned by the formation of (001)-or (111)-textured α-FeSi2 nanocrystals ensembles. A current-voltage characteristic of the structures with different preferable epitaxial alignment (α-FeSi2(001)/Si(100) and α-FeSi2(111)/Si(100)) shows good linearity at room temperature. However, it becomes non-linear at different temperatures for different ORs due to different Schottky barrier height governed by a particular epitaxial alignment of the α-FeSi2/p-Si interfaces.

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Публикация на "русском языке" Effect of epitaxial alignment on electron transport from quasi-two-dimensional iron silicide α-FeSi2 nanocrystals into p-Si(001) [Текст] / I. A. Tarasov [et al.] // Физ. и техника полупроводников. - 2018. - Т. 52 : 25th International Symposium on Nanostructures - Physics and Technology (Jun 26-30, 2017, Saint Petersburg, Russia) Вып. 5.- с.523

Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Tarasov, I. A.; Тарасов, Иван Анатольевич; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Yakovlev, I. A.; Яковлев, Иван Александрович; Volochaev, M. N.; Волочаев, Михаил Николаевич; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [16-42-243060, 16-42-243035]; Russian Foundation for Basic Research, Government of the Republic of Khakassia [17-42-190308]; International Symposium on Nanostructures - Physics and Technology(25th ; Jun 26-30, 2017 ; Saint Petersburg, Russia)
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14.

    Low-temperature structural and magnetic phase transitions in multiferroic GdFe3(BO3)4 / K. V. Frolov [et al.] // J. Alloys Compd. - 2016. - Vol. 671. - P. 545-551, DOI 10.1016/j.jallcom.2016.02.083. - Cited References:36. - We thank Dr. A.P. Dudka for help in the low temperature XRD measurements. This study was supported in part by the Russian Foundation for Basic Research (projects # 14-02-00483a and 13-02-12442), and the Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools (grant # NSh-1130.2014.5 and # NSh-924.2014.2). This work was performed using the equipment of the Shared Research Center IC RAS and was supported by the Russian Ministry of Education and Science (project RFMEFI62114X0005). . - ISSN 0925-8388. - ISSN 1873-4669
   Перевод заглавия: Низкотемпературные структурные и магнитные фазовые переходы в мультиферроике GdFe3(BO3)4

РУБ Chemistry, Physical + Materials Science, Multidisciplinary + Metallurgy & Metallurgical Engineering
Рубрики:
IRON BORATE GDFE3(BO3)4
   BIFEO3 THIN-FILMS
   MAGNETOELASTIC PROPERTIES
   RM3(BO3)4 CRYSTALS
   TRIGONAL GDFE3(BO3)4
   ENHANCED POLARIZATION
   HIGH-PRESSURES
   CRYSTALLIZATION
   BEHAVIOR
   GROWTH
Кл.слова (ненормированные):
Multiferroics -- Rare earth compounds -- X-ray diffraction -- Mossbauer -- spectroscopy -- Crystal structure -- Spin dynamics
Аннотация: X-ray analysis revealed that at temperature decreasing from room temperature to Tstr = 155 K the crystal unit cell GdFe3(BO3)4 is reduced only along the c axis (at 0.01 Å), while the a and b axes are unchanged within the error limits. The volume of the crystal decreases uniformly in the direction of all three axes at 155–80 K. At 80–30 K the crystal volume is decreased only by reduction of the parameters a and b, while the parameter c increases conversely. In the paramagnetic region Mössbauer spectra do not distinguish between the two structural positions of iron ions Fe1 and Fe2, appearing at T < Tstr. Below the temperature of the magnetic phase transition at TN = 38.0(1) K the Mössbauer data indicate quasi-one-dimensional magnetic ordering of iron moments in the sublattice Fe2 and a two-dimensional one in the iron sublattice Fe1. The dynamics of spin reorientation in sublattices Fe1 and Fe2 is studied in detail.
Рентгеновский анализ показал, что при уменьшении температуры от комнатной до Tstr = 155 K изменение параметра элементарной ячейки кристалла GdFe3(BO3)4 происходит лишь вдоль оси с (при 0,01 Å), в то время как а и b оси остаются неизменными в пределах погрешности измерений. Объем кристалла уменьшается равномерно в направлении всех трех осей при 155-80 K. При 80-30 K объем кристалла уменьшается только уменьшением параметров a и b, в то время как параметр с наоборот увеличивается. В парамагнитной области Мессбауэровские спектры не различают двух структурных позиций ионов железа Fe1 и Fe2, появляющиеся при Т˂Tstr. Ниже температуры магнитного фазового перехода при TN = 38,0(1) К Мёссбауэрские данные указывают на квази-одномерный магнитное упорядочение моментов железа в подрешетке Fe2 и двумерное в железной подрешетке Fe1. Динамика спиновой переориентации в подрешетках Fe1 и Fe2 подробно изучается.

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Держатели документа:
Russian Acad Sci, AV Shubnikov Crystallog Inst, Moscow 119333, Russia.
Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA.
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Frolov, K. V.; Lyubutin, I. S.; Smirnova, E. S.; Alekseeva, O. A.; Verin, I. A.; Artemov, V. V.; Kharlamova, S. A.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Russian Foundation for Basic Research [14-02-00483a, 13-02-12442]; Council on Grants from the President of the Russian Federation for Support of Leading Scientific Schools [NSh-1130.2014.5, NSh-924.2014.2]; Russian Ministry of Education and Science [RFMEFI62114X0005]
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15.

    Pressure-stimulated synthesis and luminescence properties of microcrystalline (Lu,Y)3Al5O12:Ce3+ garnet phosphors / V. V. Atuchin [et al.] // ACS Appl. Mater. Interfaces. - 2015. - Vol. 7, Is. 47. - P. 26235-26243, DOI 10.1021/acsami.5b08411. - Cited References: 75. - This work was partly supported by the National Natural Science Foundations of China (Grant Nos. 51272242 and 51511130035) and the Russian Foundation for Basic Research (Grant No. 15-52-53080 GFEN_a). V.V.A. was partly supported by the Ministry of Education and Science of the Russian Federation . - ISSN 1944-8244
   Перевод заглавия: Синтез стимулированный давлением и люминесцентные свойства микрокристаллических гранатов (Lu,Y)3Al5O12:Ce3+

РУБ Nanoscience & Nanotechnology + Materials Science, Multidisciplinary
Рубрики:
LASER MASS-SPECTROMETRY
   LIGHT-EMITTING-DIODES
   WHITE-LIGHT
   SINGLE-CRYSTALS
   OPTICAL-PROPERTIES
   ELECTRONIC-STRUCTURE
   VIBRATIONAL PROPERTIES
   PHASE-TRANSITIONS
   PARTICLE-SIZE
   GROWTH
Кл.слова (ненормированные):
synthesis -- pressure -- garnet -- structure -- luminescence -- phosphor
Аннотация: The Lu2.98Ce0.01Y0.01Al5O12 and Y2.99Ce0.01Al5O12 phosphors were synthesized by solid state reaction at temperature 1623 K and pressure 1.5 × 107 Pa in (95% N2 + 5% H2) atmosphere. Under the conditions, the compounds crystallize in the form of isolated euhedral partly faceted microcrystals ∼19 μm in size. The crystal structures of the Lu2.98Ce0.01Y0.01Al5O12 and Y2.99Ce0.01Al5O12 garnets have been obtained by Rietveld analysis. The photoluminescence (PL) and X-ray excited luminescence (XL) spectra obtained at room temperature indicate broad asymmetric bands with maxima near 519 and 540 nm for Y2.99Ce0.01Al5O12 and Lu2.98Ce0.01Y0.01Al5O12, respectively. The light source was fabricated using the powder Lu2.98Ce0.01Y0.01Al5O12 phosphor and commercial blue-emitting n-UV LED chips (λex = 450 nm). It is found that the CIE chromaticity coordinates are (x = 0.388, y = 0.563) with the warm white light emission correlated color temperature (CCT) of 6400 K and good luminous efficiency of 110 lm/W. © 2015 American Chemical Society.

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Держатели документа:
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
Functional Electronics Laboratory, Tomsk State University, Tomsk, Russian Federation
Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, Novosibirsk, Russian Federation
Analytical Laboratory, Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
Department of Natural Sciences, Novosibirsk State University, Novosibirsk, Russian Federation
Department of Applied Physics, Novosibirsk State University, Novosibirsk, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
Laboratory of High Pressure Minerals and Diamond Deposits, Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russian Federation
School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, China

Доп.точки доступа:
Atuchin, V. V.; Beisel, N. F.; Galashov, E. N.; Mandrik, E. M.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Yelisseyev, A. P.; Yusuf, A. A.; Xia, Z.
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16.

Magneto-optical activity of f–f transitions in ErFe3(BO3)4 and ErAl3(BO3)4 single crystals / A. V. Malakhovskii [et al.] // J. Magn. Magn. Mater. - 2015. - Vol. 384. - P. 255-265, DOI 10.1016/j.jmmm.2015.02.051. - Cited References: 44. - The work was supported by the Russian Foundation for Basic Researches Grant 12-02-00026 and by the President of Russia Grant no. Nsh-2886.2014.2. . - ISSN 0304-8853. - ISSN 1873-4766

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
CIRCULAR-DICHROISM SPECTRA
   GREEN UP-CONVERSION
   SPECTROSCOPIC PROPERTIES
   OPTICAL-PROPERTIES
   LASER
   Er3+
   ABSORPTION
   GROWTH
   IONS
   GdFe3(BO3)4
Кл.слова (ненормированные):
Magnetic circular dichroism -- Natural circular dichroism -- Rare earth ferroborates -- Rare earth alumoborates -- Electronic structure
Аннотация: Absorption, magnetic circular dichroism and natural circular dichroism spectra of ErFe3(BO3)4 and ErAl3(BO3)4 single crystals were measured as a function of temperature in the range of 90–293 K. It was found out that magneto-optical activity of the same f–f transitions in the studied crystals substantially differed and their temperature dependences did not follow the Curie–Weiss law in contrast to the properties of allowed transitions. The observed phenomena were accounted for by the nature of f–f transitions allowance. Properties of the transition 4I15/2→4S3/2 were studied in detail. In particular, the Zeeman splitting and the natural optical activity of the absorption lines composed of the transition were determined. The vibronic line with the very large natural optical activity was revealed and identified. Two nonequivalent Er3+ ion positions with the opposite chirality were found out in one of the excited states. Polarization properties of the 4I15/2→4S3/2 transition in the ErFe3(BO3)4 crystal have shown that the local symmetry of Er3+ ion in this crystal in the range of 90–293 K is lower than the D3 one. From the heat capacity measurements it was revealed, that the first order structural phase transition to lower symmetry occurred in ErFe3(BO3)4 at 433–439 K.
Поглощение, магнитный циркулярный дихроизм и спектры природного кругового дихроизма монокристаллов ErFe3(BO3)4 и ErAl3(BO3)4 были измерены в зависимости от температуры в диапазоне 90-293 К. Было обнаружено, что по магнитооптической активности одни и те жеF-F переходы в исследованных кристаллах существенно отличаются и их температурные зависимости не следовать закону Кюри-Вейсса в отличие от свойств разрешенных переходов. Наблюдаемые явления были учтены по характеру F-Fпереходов. Свойства перехода 4I15 / 2 → 4S3 / 2 были детально изучены. В частности, расщепление Зеемана и явление естественной оптической активности линий поглощения, состоящих в переходе были полны решимости. Вибронная линия очень большой естественной оптической активности выявлена и идентифицирована. Две неэквивалентных позиций ионовEr3 + с противоположной хиральности были найдены в одном из возбужденных состояний. Поляризационные свойства 4I15 / 2 → 4S3 / 2 перехода в ErFe3(BO3)4 кристалла показали, что локальная симметрия ионов Er3 + в этом кристалле в диапазоне 90-293 К ниже, чем D3. Из измерений теплоемкости Было обнаружено, что структурный фазовый переход первого типа к более низкой симметрии произошел в ErFe3(BO3) 4 при 433-439 К. Ключевые слова: Магнитный круговой дихроизм; Природные круговой дихроизм; Редкоземельные ферроборатов; Редкоземельныеalumoborates; Электронная структура; 44 источника.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Malakhovskii, A. V.; Малаховский, Александр Валентинович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Sokolov, V. V.; Соколов В. В.; Kutsak, T. V.; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Russian Foundation for Basic Researches [12-02-00026]; President of Russia Grant [Nsh-2886.2014.2]
}
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17.

    Structure and optical properties of Li2Ga2GeS6 nonlinear crystal / L. I. Isaenko [et al.] // Opt. Mater. - 2015. - Vol. 47. - P. 413-419, DOI 10.1016/j.optmat.2015.06.014. - Cited References:23. - This work was supported by the Russian Foundation of Basic Research (Grant No. 15-02-03408a) . - ISSN 0925-3467
   Перевод заглавия: Структура и оптические свойства нелинейного кристалла Li2Ga2GeS6

РУБ Materials Science, Multidisciplinary + Optics
Рубрики:
PHASE-MATCHING PROPERTIES
   MID-IR
   PARAMETRIC AMPLIFICATION
   GENERATION
   LiGaS2
   GROWTH
   DAMAGE
   Ga
   Te
   Se
Кл.слова (ненормированные):
Li2Ga2GeS6 -- Structure -- Absorption -- Raman -- Luminescence -- Excitons
Аннотация: Structure and optical properties of new nonlinear crystal - Li2Ga2GeS6 single crystal of optical quality, grown by the Bridgman technique were studied. The data on transmission, Raman scattering, luminescence emission, excitation and thermal quenching as well as thermostimulated luminescence are presented. Fundamental absorption edge is determined by the direct allowed electronic transitions: The values of optical band gap are estimated. Absorption band at 8.0 mu m is due to S-S vibrations. Features in photoluminescence spectra are associated with excitons: both free (narrow line at 371 nm) and self-trapped ones (broad bands at 596, 730 and 906 nm). Spontaneous emission in the 80-170 K range, both at crystal heating and cooling, is typical of pyroelectrics: This confirms the absence of symmetry center in Li2Ga2GeS6 and an opportunity of laser frequency nonlinear conversion. (C) 2015 Elsevier B.V. All rights reserved.

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Держатели документа:
SB RAS, VS Sobolev Inst Geol & Mineral, Novosibirsk 630090, Russia.
Novosibirsk State Univ, Novosibirsk 630090, Russia.
SB RAS, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia.
Far Eastern State Transport Univ, Khabarovsk 680021, Russia.

Доп.точки доступа:
Isaenko, L. I.; Исаенко Л. И.; Yelisseyev, A. P.; Елисеев, Александр Павлович; Lobanov, S. I.; Лобанов С. И.; Krinitsin, P. G.; Криницын, Павел Геннадьевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Russian Foundation of Basic Research [15-02-03408a]
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18.

    Crystal chemistry and luminescence properties of red-emitting CsGd1−xEux(MoO4)2 solid-solution phosphors / P. L. Shi [et al.] // Dalton Trans. - 2014. - Vol. 43, Is. 25. - P. 9669-9676, DOI 10.1039/C4DT00339J. - Cited References: 46. - The present work was supported by the National Natural Science Foundations of China (grant no. 51002146, 51272242), Natural Science Foundations of Beijing (2132050), the Program for New Century Excellent Talents in University of Ministry of Education of China (NCET-12-0950), Beijing Nova Program (Z131103000413047), Beijing Youth Excellent Talent Program (YETP0635), the Fundamental Research Funds for the Central Universities (2-9-2014-044), and the Funds of the State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University (KF201306). V. V. A. gratefully acknowledges the Ministry of Education and Science of the Russian Federation for the financial support. . - ISSN 1477-9226. - ISSN 1477-9234
   Перевод заглавия: Кристаллохимия и люминесцентные свойства твердых растворов люминофоров CsGd1-xEux(MoO4)2, излучающих красный свет

РУБ Chemistry, Inorganic & Nuclear
Рубрики:
WHITE-LIGHT
   VIBRATIONAL PROPERTIES
   HYDROTHERMAL SYNTHESIS
   SINGLE-CRYSTALS
   DIODES
   EFFICIENCY
   PHOTOLUMINESCENCE
   CSGD(MOO4)2
   MORPHOLOGY
   GROWTH
Аннотация: Scheelite related alkali-metal rare-earth double molybdate compounds with a general formula of ALn(MoO4)2 can find wide application as red phosphors. The crystal chemistry and luminescence properties of red-emitting CsGd1−xEux(MoO4)2 solid-solution phosphors have been evaluated in the present paper. A detailed analysis of the structural properties indicates the formation of isostructural scheelite-type CsGd1−xEux(MoO4)2 solid-solutions over the composition range of 0 ≤ x ≤ 1. The photoluminescence emission (PL) and excitation (PLE) spectra, and the decay curves were measured for this series of compounds. The critical doping concentration of Eu3+ is determined to be x = 0.6 in order to realize the maximum emission intensity. The emission spectra of the as-obtained CsGd(1−x)Eux(MoO4)2 phosphors show narrow high intensity red lines at 592 and 615 nm upon excitation at 394 or 465 nm, revealing great potential for applications in white light-emitting diode devices.

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China Univ Geosci, Sch Mat Sci & Technol, Beijing 100083, Peoples R China
Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
RAS, Kirensky Inst Phys, Lab Crystal Phys, SB, Krasnoyarsk 660036, Russia
RAS, Kirensky Inst Phys, Lab Opt Mat & Struct, SB, Novosibirsk 630090, Russia
Tomsk State Univ, Funct Elect Lab, Tomsk 634050, Russia
Novosibirsk State Univ, Lab Semicond & Dielectr Mat, Novosibirsk 630090, Russia

Доп.точки доступа:
Shi, P. L.; Xia, Zhiguo; Molokeev, M. S.; Молокеев, Максим Сергеевич; Atuchin, V. V.
}
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19.

Solid-phase synthesis of manganese silicides on the Si(100)2 x 1 surface / S. N. Varnakov [et al.] // Phys. Solid State. - 2014. - Vol. 56, Is. 4. - P. 812-815, DOI 10.1134/S1063783414040337. - Cited References: 20. - This study was supported by the Russian-German Laboratory at HZB BESSY, the Russian Foundation for Basic Research (project nos. 13-02-00398 and 13-02-01265), the Council on Grants from the President of the Russian Federation for Support of the Leading Scientific Schools (grant no. NSh-1044.2012.2), and the Integration Project No. 85 of the Siberian and Ural Branches of the Russian Academy of Sciences. . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
PHOTOELECTRON-SPECTROSCOPY
GROWTH
FILMS
Аннотация: The solid-phase synthesis of manganese silicides on the Si(100)2 × 1 surface coated at room temperature by a 2-nm-thick manganese film has been investigated using high-energy-resolution photoelectron spectroscopy with synchrotron radiation. The dynamics of variation of the phase composition and electronic structure of the near-surface region with increasing sample annealing temperature to 600°C, has been revealed. It has been shown that, under these conditions, a solid solution of silicon in manganese, metallic manganese monosilicide MnSi, and semiconductor silicide MnSi1.7 are successively formed on the silicon surface. The films of both silicides are not continuous, with the fraction of the substrate surface occupied by them decreasing with increasing annealing temperature. The binding energies of the Si 2p and Mn 3p electrons in the compounds synthesized have been determined.

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Публикация на русском языке Твердофазный синтез силицидов марганца на поверхности Si(100)2x1 [Текст] / С. Н. Варнаков [и др.] // Физ. тверд. тела. - 2014. - Т. 56 Вып. 4. - С. 779-782

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Russian Acad Sci, Ioffe Phys Tech Inst, St Petersburg 194021, Russia

Доп.точки доступа:
Varnakov, S. N.; Варнаков, Сергей Николаевич; Gomoyunova, M. V.; Grebenyuk, G.S .; Zabluda, V. N.; Заблуда, Владимир Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Pronin, I. I.; Russian-German Laboratory at HZB BESSY; Russian Foundation for Basic Research [13-02-00398, 13-02-01265]; Council on Grants from the President of the Russian Federation for Support of the Leading Scientific Schools [NSh-1044.2012.2]; Siberian Branch of the Russian Academy of Sciences [85]; Ural Branch of the Russian Academy of Sciences [85]
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20.

    Spectroscopic properties of ErAl3(BO3)4 single crystal / A. V. Malakhovskii [et al.] // Chem. Phys. - 2014. - Vol. 428. - P. 137–143, DOI 10.1016/j.chemphys.2013.11.008. - Cited References: 43. - The work was supported by the Russian Foundation for Basic Researches grant 12-02-00026, by the Russian President Grants SS-1044.2012.2 and 4828.2012.2, by project No 3.9.5 PSB RAS, and by the Ministry of Education and Science of Russian Federation grant 8365 . - ISSN 0301-0104. - ISSN 1873-4421
   Перевод заглавия: Спектроскопические свойства монокристалла ErAl3(BO3)4

РУБ Chemistry, Physical + Physics, Atomic, Molecular & Chemical
Рубрики:
RARE-EARTH IONS
   GREEN UP-CONVERSION
   ER3+ IONS
   MICROCHIP LASER
   ABSORPTION INTENSITIES
   YAL3(BO3)4 CRYSTAL
   OPTICAL-ABSORPTION
   FIELD ANALYSIS
   GROWTH
   LUMINESCENCE
Кл.слова (ненормированные):
Rare earth compounds -- Er3+ -- Spectroscopic properties -- Judd-Ofelt analysis -- Luminescence
Аннотация: Single crystal of ErAl3(BO3)4 was grown and its structure was studied. Polarized absorption spectra of ErAl3(BO3)4 single crystal were measured in the spectral range 1670–330 nm (6000–30000 cm−1). The Judd–Ofelt spectroscopic parameters have been determined: Ω2 = 4.87 × 10−20 cm2, Ω4 = 2.49 × 10−20 cm2, Ω6 = 2.72 × 10−20 cm2. These parameters have been used to calculate the radiative transition probabilities, the multiplet luminescence branching ratios and the fluorescence life times of the manifolds. The luminescence spectra due to transitions 2H11/2 → 4I15/2 (526 nm), 4S3/2 → 4I15/2 (548 nm), 4F9/2 → 4I15/2 (662 nm), 2H11/2 → 4I13/2 + 4I9/2 → 4I15/2 (800 nm) and 4S3/2 → 4I13/2 (855 nm) were recorded in α, σ and π polarizations. The most intensive luminescence belonged to 4S3/2 → 4I15/2 transition (548 nm).
Поляризованные спектры поглощения ErAl3 (BO3) 4 монокристалла были измерены в спектральном диапазоне 1670-330 нм (6000-30000 см-1). Спектроскопические параметры Джадда-Офельта были определены как: Ω2 = 4,87 • 10-20 см2, Ω4 = 2.49 • 10-20 см2, Ω6 = 2,72 • 10-20 см2. Параметры были использованы для расчета вероятностей излучающих переходов, мультиплетные отношения люминесценции раскола и времена жизни мультиплетов. Спектры люминесценции за счет переходов 2П11 / 2 → 4I15 / 2 (526 нм), 4S3 / 2 → 4I15 / 2 (548 нм), 4F9 / 2 → 4I15 / 2 (662 нм), 2П11 / 2 → 4I13 / 2 + 4I9 / 2 → 4I15 / 2 (800 нм) и 4S3 / 2 → 4I13 / 2 (855 нм) были записаны в α, σ и π поляризации. Наиболее интенсивное свечение принадлежало переходу 4S3 / 2 → 4I15 / 2 (548 нм).

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Malakhovskii, A. V.; Малаховский, Александр Валентинович; Kutsak, T. V.; Куцак, Т. В.; Sukhachev, A. L.; Сухачев, Александр Леонидович; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Krylov, A. S.; Крылов, Александр Сергеевич; Gudim, Irina A.; Гудим, Ирина Анатольевна; Molokeev, M. S.; Молокеев, Максим Сергеевич
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