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    Synthesis, structure, and properties of EuErCuS3 / A. V. Ruseikina [et al.] // J. Alloys Compd. - 2019. - Vol. 805. - P. 779-788, DOI 10.1016/j.jallcom.2019.07.059. - Cited References: 54. - The work was supported by the State budget allocated to the fundamental research in the Ministry of Science and Education, Russian Federation of (Project No. V.45.3.3); by RFBR Grant 17-02-00754 ; by the Ministry of Science and Higher Education of the Russian Federation under Project No 3.9534.2017/8.9. . - ISSN 0925-8388
   Перевод заглавия: Синтез, структура и свойства EuErCuS3
Кл.слова (ненормированные):
Inorganic materials -- Thermochemistry -- Spectroscopy -- Magnetic measurements -- Optical spectroscopy -- X-ray diffraction
Аннотация: The crystal structure of the first-synthesized compound EuErCuS3 was determined from X-ray powder diffraction data: orthorhombic crystal system, space group Pnma, structural type Eu2CuS3: a = 10.1005(2) Å, b = 3.91255(4)Å, c = 12.8480(2) Å; V = 507.737(14) Å3, Z = 4, and ρx = 6.266 g/cm3. The temperatures and enthalpies of reversible polymorphic transitions and incongruent melting of the compound were determined by DSC: Tα↔β = 1524 K, ΔНα↔β = 2.3 ± 0.2 kJ∙mol−1; Tβ↔γ = 1575 K, ΔНβ↔γ = 0.7 ± 0.1 kJ∙mol−1; Tγ↔δ = 1602 K; ΔНγ↔δ = 1.3 ± 0.1 kJ∙mol−1 and Tcr = 1735 ± 10 K, ΔНcr = −3.5 ± 0.3 kJ∙mol−1. IR spectra were recorded in the range from 50 to 400 cm−1. The compound was found to be IR-transparent in the range 4000–400 cm−1. The compound was characterized by Raman spectroscopy. The observed spectra featured both Raman lines and luminescence. Ab initio calculations of the EuErCuS3 crystal structure and phonon spectrum were performed, the frequencies and types of fundamental modes were determined, and the involvement of constituent ions in the IR and Raman modes was assessed from an analysis of the ab initio displacement vectors. The vibrational spectra were interpreted. EuErCuS3 manifests a ferrimagnetic transition at 4.8 K. Its microhardness is 2850 MPa. The obtained data can serve as the basis for predicting the properties of EuLnCuS3 compounds. Valence states for Eu (2+) and Er (3+) are proved both by the XRD and optical methods. Optical band gap was found to be 1.934 eV from diffuse reflectance spectrum.

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Держатели документа:
Institute of Chemistry, University of Tyumen, Tyumen, 625003, Russian Federation
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Krasnoyarsk, 660049, Russian Federation
Institute of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg, 620002, Russian Federation
Laboratory of Coherent Optics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Department of Photonics and Laser Technologies, Siberian Federal University, Krasnoyarsk, 660079, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660079, Russian Federation
Institute of Chemistry and Chemical Technology SB RAS, Federal Research Center “Krasnoyarsk Science Center SB RAS”, Russian Federation
Institute of Physics and Technology, University of Tyumen, Tyumen, 625003, Russian Federation

Доп.точки доступа:
Ruseikina, A. V.; Solovyov, L. A.; Chernyshev, V. А.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Andreev, O. V.; Krylova, S. N.; Крылова, Светлана Николаевна; Krylov, A. S.; Крылов, Александр Сергеевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Maximov, N. G.; Grigoriev, M. V.; Garmonov, A. A.; Matigorov, A. V.
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Dielectric and Raman spectroscopy measurements across structural phase transition in multiferroic HoFe3(BO3)4 single crystal / A. Tripathy [et al.] // AIP Conf. Proc. - 2019. - Vol. 2162: International Conference on Advanced Materials, ICAM 2019. - Ст. 020062, DOI 10.1063/1.5130272. - Cited References: 10. - DKS acknowledges support from the DST, New Delhi, India through the grant no INI/RUS/RFBR/P-269 (Indo Russian project). K.G. thanks, Council of Scientific and Industrial Research, New Delhi, India, for support in the form of SRF.
Аннотация: We report on findings in the HoFe3(BO3)4 single crystal across structural phase transition by the dielectric and Raman spectroscopic measurements. In most of the compounds of RFe3(BO3)4 (R=La-Lu) family low temperature P3121 structure is introduced through structural phase transition (from space group R32). Temperature dependent dielectric measurements on the HoFe3(BO3)4 crystal depicts a step like feature at the structural phase transition at ?366 K. The Raman spectroscopy study also confirms the structural transition around this temperature. A clear signature of structural transition is reflected in the Raman spectra, mainly in the frequency range (200-400 cm-1). Appearance of new Raman modes below the transition temperature also indicates that the transition is from a high symmetry phase to a low symmetry phase.

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UGC-DAE Consortium for Scientific Research, Indore, 452001, India
Department of Physics, Aligarh Muslim University, Aligarh, 202002, India
L. V. Kirensky Institute of Physics, Siberian Branch of Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Tripathy, A.; Gautam, K.; Dey, K.; Ahad, A.; Gudim, I. A.; Гудим, Ирина Анатольевна; Sathe, V. G.; Shukla, D. K.; International Conference on Advanced Materials(12-14 June 2019 ; Kannur, India)
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Structural and electron transport properties of CaFe2O4 synthesized in air and in helium atmosphere / Yu. V. Knyazev [et al.] // J. Alloys Compd. - 2020. - Vol. 820. - Ст. 153073, DOI 10.1016/j.jallcom.2019.153073. - Cited References: 37. - The reported study was partially supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science (grant #18-42-243011) and the UMNIK Program. . - ISSN 0925-8388. - ISSN 1873-4669
Кл.слова (ненормированные):
CaFe2O4 -- Mössbauer spectroscopy -- EXAFS/XANES -- XPS -- Conductivity measurements -- Activation energy
Аннотация: The samples with the CaFe2O4-type crystal structure were obtained by the solid-state reaction method at 1000 °C in the air and the helium atmosphere for the first time. We investigated the modification of the structural and electronic properties of the obtained samples. Mössbauer, XAFS-, XPS-spectroscopies, and dc-, ac-conductivity measurements were carried out. Mössbauer and XAFS-spectroscopies showed that the local environment of Fe and Ca cations does not change in the case of the inert atmosphere synthesis. Nevertheless, a sharp six-order increase in the electrical resistance observed at room temperature for the sample obtained in the in the helium atmosphere. Moreover, calculated from dc-conductivity data activation energy rises from 0.327 for the air-synthesized sample to 0.585 eV for helium-obtained one. This behavior indicates significant modification of in-band-gap energy structure, which correlated with thermally activated charge carriers. Our ac-conductivity measurements in the frequency range of 1 kHz–2 MHz for the CaFe2O4 obtained in the air showed the presence of defect levels in the energy band structure. Oxygen pressure reduction during the synthesis results in levels vanishing. Therefore, we suppose the key role of oxygen atoms in the transport properties of the material, which is indirectly confirmed by XPS data. In prospect, CaFe2O4 can be used in promising gas analyzers.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036, Krasnoyarsk, Russia
NRC “Kurchatov Institute”, 123182, Moscow, Russia
Boreskov Institute of Catalysis, Russian Academy of Sciences, Siberian Branch, 630090, Novosibirsk, Russia
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, 660036, Krasnoyarsk, Russia

Доп.точки доступа:
Knyazev, Yu. V.; Князев, Юрий Владимирович; Tarasov, A. S.; Тарасов, Антон Сергеевич; Platunov, M. S.; Платунов, Михаил Сергеевич; Trigub, A. L.; Bayukov, O. A.; Баюков, Олег Артемьевич; Boronin, A. I.; Solovyov, L. A.; Rabchevskii, E. V.; Shishkina, N. N.; Anshits, A. G.
}
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Measurements of the optical and magneto-optical properties of Fe-Si layer structures at different temperatures / S. A. Lyashchenko [et al.] // Fourth Asian school-conference on physics and technology of nanostructured materials (ASCO-NANOMAT 2018) : proceedings / progr. com. S. G. Ovchinnikov [et al.]. - 2018. - Ст. III.24.05p. - P. 139 . - ISBN 978-5-7444-4368-9
Аннотация: The temperature boundaries of phase stability, stability of surface morphology and optical properties of synthesized iron silicides are determined. In the spectral range 1.5ч3.5 eV, the temperature dependences of the optical and magneto-optical properties of Fe, Fe3Si, β-FeSi2 and Fe5Si3 were measured. A significant effect of Fe and Si impurity atoms on the temperature dependences of the optical properties of iron silicides was observed.

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Доп.точки доступа:
Ovchinnikov, S. G. \progr. com.\; Овчинников, Сергей Геннадьевич; Lyashchenko, S. A.; Лященко, Сергей Александрович; Maximova, O. A.; Максимова, Ольга Александровна; Shevtsov, D. V.; Шевцов, Дмитрий Валентинович; Yakovlev, I. A.; Яковлев, Иван Александрович; Tarasov, I. A.; Тарасов, Иван Анатольевич; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Asian School-Conference on Physics and Technology of Nanostructured Materials(4 ; 2018 ; Sept. ; 23-28 ; Vladivostok); Азиатская школа-конференция по физике и технологии наноструктурированных материалов(4 ; 2018 ; сент. ; 23-28 ; Владивосток); Институт автоматики и процессов управления ДВО РАН; Дальневосточный федеральный университет
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Development of techniques for processing data from magneto-ellipsometry measurements / O. A. Maximova [et al.] // Fourth Asian school-conference on physics and technology of nanostructured materials (ASCO-NANOMAT 2018) : proceedings / progr. com. S. G. Ovchinnikov [et al.]. - 2018. - Ст. IV.25.05p. - P. 180 . - ISBN 978-5-7444-4368-9
Аннотация: The approach to data processing for layered thin films with a ferromagnet layer is proposed for studying optical and magneto- optical properties. The scope and applicability of models which describe reflective layered structures are studied in order to recommend the best model choice for each case. A significant effect of penetration depth on this choice was observed.

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Доп.точки доступа:
Ovchinnikov, S. G. \progr. com.\; Овчинников, Сергей Геннадьевич; Maximova, O. A.; Максимова, Ольга Александровна; Lyashchenko, S. A.; Лященко, Сергей Александрович; Shevtsov, D. V.; Шевцов, Дмитрий Валентинович; Yakovlev, I. A.; Яковлев, Иван Александрович; Ovchinnikov, S. G.; Asian School-Conference on Physics and Technology of Nanostructured Materials(4 ; 2018 ; Sept. ; 23-28 ; Vladivostok); Азиатская школа-конференция по физике и технологии наноструктурированных материалов(4 ; 2018 ; сент. ; 23-28 ; Владивосток); Институт автоматики и процессов управления ДВО РАН; Дальневосточный федеральный университет
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Formation of the magnetic subsystems in antiferromagnetic NiO nanoparticles using the data of magnetic measurements in fields up to 250 kOe / S. I. Popkov [et al.] // J. Magn. Magn. Mater. - 2019. - Vol. 483. - P. 21-26, DOI 10.1016/j.jmmm.2019.03.004. - Cited References: 76. - We are grateful S.V. Semenov and A.A. Dubrovskiy for their help, S.V. Komogortsev and A.D. Balaev for fruitful discussions, and M.N. Volochaev for the TEM measurements. The TEM investigations were carried out on the equipment of the Center of Collective Use of the Federal Research Center “Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences”. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science, to the research project: «Magnetic reversal of magnetic nanoparticles in strong pulsed magnetic fields - a new approach to the study of dynamic effects associated with the magnetization of magnetic nanoparticles» (project no. 18-42-240012). . - ISSN 0304-8853
Кл.слова (ненормированные):
Antiferromagnetic nanoparticle -- External magnetic field -- Low temperature regions -- Magnetic subsystems -- Magnetically actives -- Magnetization curves -- Paramagnetic subsystems -- Pulsed magnetic fields -- Magnetic bubbles
Аннотация: It is well-known that the fraction of surface atoms and the number of defects in an antiferromagnetic particle increase with a decrease in the particle size to tens of nanometers, which qualitatively changes the properties of the particle. Specifically, in antiferromagnetic nanoparticles, spins in the ferromagnetically ordered planes can partially decompensate; as a result, an antiferromagnetic particle acquires a magnetic moment. As a rule, uncompensated chemical bonds of the surface atoms significantly weaken the exchange coupling with the antiferromagnetic particle core, which can lead to the formation of an additional magnetic subsystem paramagnetic at high temperatures and spin-glass-like in the low-temperature region. The existence of several magnetic subsystems makes it difficult to interpret the magnetic properties of antiferromagnetic nanoparticles. It is shown by the example of NiO nanoparticles with an average size of 8 nm that the correct determination of the contributions of the magnetic subsystems forming in antiferromagnetic nanoparticles requires magnetic measurements in much stronger external magnetic fields than those commonly used in standard experiments (up to 60–90 kOe). An analysis of the magnetization curves obtained in pulsed magnetic fields up to 250 kOe allows one to establish the contributions of the uncompensated particle magnetic moment μun, paramagnetic subsystem, and antiferromagnetic particle core. The μun value obtained for the investigated NiO particles is consistent with the Néel model, in which μun ∼ N1/2 (N is the number of magnetically active atoms in a particle), and thereby points out the existence of defects on the surface and in the bulk of a particle. It is demonstrated that the anomalous behavior of the high-field susceptibility dM/dH of antiferromagnetic NiO nanoparticles, which was observed by many authors, is caused by the existence of a paramagnetic subsystem, rather than by the superantiferromagnetism effect.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences”, Krasnoyarsk, 660036, Russian Federation
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russian Federation

Доп.точки доступа:
Popkov, S. I.; Попков, Сергей Иванович; Krasikov, A. A.; Красиков, Александр Александрович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Kirillov, V. L.; Martyanov, O. N.; Balaev, D. A.; Балаев, Дмитрий Александрович
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Maximova, O. A.
Possibility of using analytical method to calculate magneto-optical parameter from magneto-ellipsometry measurements data / O. A. Maximova, S. G. Ovchinnikov // The Fifth Asian School-Conference on Physics and Technology of Nanostructured Materials : Proceedings. - VLadivostok : Dalnauka Publishing, 2020. - Ст. IV.31.13p. - P. 122. - This study was supported by the Research Grant No. 075-15-2019-1886 from the Government of the Russian Federation. . - ISBN 978-5-8044-1698-1

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Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Максимова, Ольга Александровна; Asian School-Conference on Physics and Technology of Nanostructured Materials(5 ; 2020 ; 30 Jul - 3 Aug ; Vladivostok); Азиатская школа-конференция по физике и технологии наноструктурированных материалов(5 ; 2013 ; 30 июля - 3 авг. ; Владивосток)
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Maksimova, O. A.
How to obtain the dielectric tensor from spectral magneto-optical ellipsometry measurements data / O.A. Maximova, S.A. Lyaschenko, S.G. Ovchinnikov // 1st FunMAX Workshop 2020 : Book of Abstracts. - 2020. - P. 18. - Cited References: 6. - This study was supported by the Research Grant No. 075-15-2019-1886 from the Government of the Russian Federation.

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Держатели документа:
Kirensky Institute of Physics

Доп.точки доступа:
Lyashchenko, S. A.; Лященко, Сергей Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Максимова, Ольга Александровна; International Online Workshop on the properties of Functional MAX-materials(1 ; 2020 ; Aug ; 10-12 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН
}
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Maximova, O. A.
How to obtain the dielectric tensor from spectral magneto-optical ellipsometry measurements data / O. A. Maximova, S. A. Lyashchenko, S. G. Ovchinnikov ; чл. орг. ком.: M. Farle [et al.] ; секр. орг. ком. T. E. Smolyarova // International workshop on functional MAX-materials (1st FunMax). - 2020. - P. 18. - Cited references: 6. - This study was supported by the Research Grant No. 075-15-2019-1886 from the Government of the Russian Federation

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Lyashchenko, S. A.; Лященко, Сергей Александрович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Farle, M. \чл. орг. ком.\; Tarasov, A. S. \чл. орг. ком.\; Тарасов, Антон Сергеевич; Ovchinnikov, S. G. \чл. орг. ком.\; Smolyarova, T. E. \секр. орг. ком.\; Смолярова, Татьяна Евгеньевна; Максимова, Ольга Александровна; International workshop on functional MAX-materials(1 ; 2020 ; Aug. 10-12 ; Krasnoyarsk (on-line)); Kirensky Institute of Physics
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10.

Application of DMA 242 C for quasi-static measurements of piezoelectric properties of solids / P. P. Turchin, V. I. Turchin, S. V. Yurkevich [et al.] // J. Sib. Fed. Univ. Math. Phys. - 2020. - Vol. 13, Is. 1. - P. 97-103 ; Журн. СФУ. Матем. и физика, DOI 10.17516/1997-1397-2020-13-1-97-103. - Cited References: 26. - The reported study was funded by Russian Foundation for Basic Research project no. 18-42-240016, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science, to the research project: "Electromechanical Properties and Anisotropy of Acoustic Wave Propagation in Yttrium Aluminoborates Single Crystals" . - ISSN 1997-1397
Кл.слова (ненормированные):
Piezoelectric modules -- Quasistatic method -- Multiferroics
Аннотация: An experimental device for quasi-static measurements of piezoelectric moduli dijk, based on the possibilities of precision variations in mechanical stresses with the device DMA 242 C in the frequency range 0-100 Hz has been developed. A special sample holder and a charge amplifier are used in the measuring scheme. The measurements of piezoelectric moduli values of trigonal piezoelectric single crystalls La3Ga5SiO14 (P321) and YAl3(BO3)4 (R32), as well as hexagonal ZnO (P63mc) have been carried out.

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Держатели документа:
Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Turchin, P. P.; Турчин, Павел Петрович; Turchin, V. I.; Yurkevich, S. V.; Sukhodaev, P. O.; Raikova, I. S.

}
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11.

Velikanov, D. A.
High-sensitivity measurements of the magnetic properties of materials at cryogenic temperatures / D. A. Velikanov // Inorg. Mater.: Appl. Res. - 2020. - Vol. 11, Is. 4. - P. 801-808, DOI 10.1134/S2075113320040413. - Cited References: 17. - This study was supported by the Russian Foundation for Basic Research, the Government of Krasnoyarsk Krai, and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activity, project no. 17-42-240080 “Study of the Effect of the Size, Morphology, and Fabrication Technology on the Functional Properties of Biomagnetic Nanodevices Based on 3 d Metals and Their Oxides.” . - ISSN 2075-1133
Кл.слова (ненормированные):
quantum interferometer -- magnetometer -- dynamic range -- magnetic moment -- magnetization
Аннотация: An original magnetometer based on a dc superconducting quantum interferometer is described. The design features of the device are discussed and functional diagrams of its new units are presented. The magnetic moment measurement methods that optimize the measurement process are proposed. Examples of the investigations carried out on the samples of different materials are given. The factors affecting the reliability of the magnetic measurements are considered.

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Публикация на русском языке Великанов, Дмитрий Анатольевич. Высокочувствительные измерения магнитных свойств материалов при криогенных температурах [Текст] / Д. А. Великанов // Материаловедение. - 2019. - № 10. - С. 10-18

Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Великанов, Дмитрий Анатольевич
}
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12.

Chirkin, A. S.
General formula for the natural width of optical parametric oscillator spectral lines / A. S. Chirkin // Laser Phys. Lett. - 2020. - Vol. 17, Is. 11. - Ст. 115401, DOI 10.1088/1612-202X/abb6e6. - Cited References: 21 . - ISSN 1612-2011. - ISSN 1612-202X

РУБ Optics + Physics, Applied
Рубрики:
QUANTUM-FLUCTUATIONS
   PHASE MEASUREMENTS
   STATES
   NOISE
Кл.слова (ненормированные):
optical parametric oscillator -- phase fluctuation -- frequency deviation operator -- natural spectrum width
Аннотация: A new approach to the quantum analysis of the spectral linewidths of optical parametric oscillators (OPOs) is proposed. The approach is based on introducing a Hermitian frequency deviation operator. The spectral linewidths in the triply resonant OPO above-threshold regime have been calculated. It has been found that the width of the generated spectral line depends on the loss at all interacting frequencies, the photon number of frequency under study, and the threshold photon number of pump. The formula obtained for the spectral width is general; in particular cases, it yields the well-known results. The developed simple approach can be applied to the quantum analysis of the spectra of various oscillatory systems, for example, the multifrequency parametric and non-linear optomechanical interactions and lasers.

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Держатели документа:
Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119991, Russia.
Moscow MV Lomonosov State Univ, Int Laser Ctr, Moscow 119991, Russia.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Чиркин, Анатолий С.
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13.

    In situ magneto-optical ellipsometry data analysis for films growth control / O. A. Maximova [et al.] // J. Magn. Magn. Mater. - 2017. - Vol. 440: EURO-Asian Symposium on Trends in Magnetism (EASTMAG) (AUG 15-19, 2016, Siberian Fed Univ, Krasnoyarsk, RUSSIA). - P. 196-198, DOI 10.1016/j.jmmm.2016.12.050. - Cited References:10. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project Nos. 16-42-243058 and 16-42-243060. The work was supported partly by the Russian Foundation for Basic Research, Grant nos. 16-32-00209 mol_a and 14-02-01211; the Complex program of SB RAS II.2P, project 0358-2015-0004; the Ministry of Education and Science of the RF (State task no. 16.663.2014); Grant Scientific School 7559.2016.2. . - ISSN 0304-8853. - ISSN 1873-4766
   Перевод заглавия: Анализ данных in situ магнитооптической эллипсометрии для контроля роста пленок

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter

Кл.слова (ненормированные):
Magneto-optical Kerr effect -- Ellipsometry -- In situ measurements
Аннотация: In this work we present the way of ferromagnetic films study by means of magneto-ellipsometry. The method of interpretation of in situ magneto-optical ellipsometry spectra for real time growth control is described. The method has been successfully tested on Si/SiO2/Fe films within the model of a homogeneous semi-infinite medium. As a result, the dielectric tensor components for Fe layer were calculated using a developed approach.

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Доп.точки доступа:
Maximova, O. A.; Максимова, Ольга Александровна; Kosyrev, N. N.; Косырев, Николай Николаевич; Varnakov, S. N.; Варнаков, Сергей Николаевич; Lyashchenko, S. A.; Лященко, Сергей Александрович; Yakovlev, I. A.; Яковлев, Иван Александрович; Tarasov, I. A.; Тарасов, Иван Анатольевич; Shevtsov, D. V.; Шевцов, Дмитрий Валентинович; Maximova, O. M.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Foundation for Basic Research; Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology [16-42-243058, 16-42-243060]; Russian Foundation for Basic Research [16-32-00209 mol_a, 14-02-01211]; SB RAS II.2P [0358-2015-0004]; Ministry of Education and Science of RF [16.663.2014]; Grant Scientific School [7559.2016.2]; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН
}
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14.

Shevtsov, D. V.
An ultrahigh-vacuum multifunctional apparatus for synthesis and in situ investigation of low-dimensional structures by spectral magnetoellipsometry in the temperature range of 85–900 K / D. V. Shevtsov, S. A. Lyaschenko, S. N. Varnakov // Instrum. Exp. Tech. - 2017. - Vol. 60, Is. 5. - P. 759-763, DOI 10.1134/S0020441217050086. - Cited References: 19. - This study was supported by a Grant of the President of the Russian Federation for Support of Leading Schools (project no. NSh-7559.2016.2), by the Russian Foundation for Basic Research, the Government of Krasnoyarsk krai, and the Krasnoyarsk krai foundation for support of scientific and research and technical activity as a part of the scientific project no. 16-42-243058. . - ISSN 0020-4412
Кл.слова (ненормированные):
Semiconducting silicon -- Temperature distribution -- Ultrahigh vacuum -- Ellipsometric measurements -- In-situ investigations -- Low dimensional structure -- Metallic nanostructure -- Multifunctional apparatus -- Optical and magneto-optical properties -- Temperature dependence -- Temperature range -- Optical properties
Аннотация: This paper presents the results of modernizing an ultrahigh-vacuum multifunctional apparatus that allows one to obtain semiconductor or metallic nanostructures in a single technological cycle and to investigate their optical and magneto-optical properties in a temperature range of 85–900 K. The capabilities of the developed system were demonstrated based on the example of studying the temperature dependence of the bulk Si permittivity via spectral ellipsometric measurements. © 2017, Pleiades Publishing, Inc.

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Публикация на русском языке Шевцов, Дмитрий Валентинович. Сверхвысоковакуумная многофункциональная установка для синтеза низкоразмерных структур и их in situ исследований методом спектральной магнитоэллипсометрии в температурном диапазоне 85-900 K [Текст] / Д. В. Шевцов, С. А. Лященко, С. Н. Варнаков // Приборы и техн. эксперим. : Наука, 2017. - № 5. - С. 146-150

Держатели документа:
Kirenskiy Institute of Physics, Federal Research Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation
Reshetnev Siberial State Aerospace University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Lyashchenko, S. A.; Лященко, Сергей Александрович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Шевцов, Дмитрий Валентинович
}
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15.

Temperature behavior of the antiferromagnetic susceptibility of nanoferrihydrite from the measurements of the magnetization curves in fields of up to 250 kOe / D. A. Balaev [et al.] // Phys. Solid State. - 2017. - Vol. 59, Is. 10. - P. 1940-1946, DOI 10.1134/S1063783417100031. - Cited References:45. - This work was supported by the Russian Foundation for Basic Research, the Government of Krasnoyarsk region, the Krasnoyarsk Regional Foundation of Supporting the Scientific and Scientific-Engineering Activity in the framework of the scientific projects nos. 17-42-240138 and 17-43-240527. . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
FERRIHYDRITE NANOPARTICLES
BACTERIAL FERRIHYDRITE
HYSTERESIS
Аннотация: The cross-breeding problem of the temperature dependence of the antiferromagnetic susceptibility of ferrihydrite nanoparticles is considered. Iron ions Fe3+ in ferrihydrite are ordered antiferromagnetically; however, the existence of defects on the surface and in the bulk of nanoparticles induces a noncompensated magnetic moment that leads to a typical superparamagnetic behavior of ensemble of the nanoparticles with a characteristic blocking temperature. In an unblocked state, magnetization curves of such objects are described as a superposition of the Langevin function and the linear-in-field contribution of the antiferromagnetic “core” of the nanoparticles. According to many studies of the magnetization curves performed on ferrihydrite (and related ferritin) nanoparticles in fields to 60 kOe, dependence χAF(T) decreases as temperature increases, which was related before to the superantiferromagnetism effect. As the magnetic field range increases to 250 kOe, the values of χAF obtained from an analysis of the magnetization curves become lower in magnitude; however, the character of the temperature evolution of χAF is changed: now, dependence χAF(T) is an increasing function. The latter is typical for a system of AF particles with random orientation of the crystallographic axes. To correctly determine the antiferromagnetic susceptibility of AF nanoparticles (at least, ferrihydrite) and to search for effects related to the superantiferromagnetism effect, it is necessary to use in experiments the range of magnetic field significantly higher than that the standard value 60 kOe used in most experiments. The study of the temperature evolution of the magnetization curves shows that the observed crossover is due to the existence of small magnetic moments in the samples.

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Публикация на русском языке Температурное поведение антиферромагнитной восприимчивости нано-ферригидрита из измерений кривых намагничивания в полях до 250 kOe [Текст] / Д. А. Балаев [и др.] // Физ. тверд. тела : Наука, 2017. - Т. 59 Вып. 10. - С. 1920-1926

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Akademgorodok 50, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Svobodnyi Pr 79, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Krasnoyarsk Sci Ctr, Siberian Branch, Fed Sci Ctr, Akademgorodok 50, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Popkov, S. I.; Попков, Сергей Иванович; Krasikov, A. A.; Красиков, Александр Александрович; Balaev, A. D.; Балаев, Александр Дмитриевич; Dubrovskiy, A. A.; Дубровский, Андрей Александрович; Stolyar, S. V.; Столяр, Сергей Викторович; Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Ladygina, V. P.; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Russian Foundation for Basic Research; Government of Krasnoyarsk region; Krasnoyarsk Regional Foundation of Supporting the Scientific and Scientific-Engineering Activity in the framework of the scientific projects [17-42-240138, 17-43-240527]
}
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16.

    Миронов, Валерий Леонидович.
    Микроволновый радиометрический метод измерения температуры поверхности почвы арктической тундры / В. Л. Миронов, К. В. Музалевский, З. Ружичка // Совр. пробл. дистан. зондир. Земли из космоса. - 2017. - Т. 14, Вып. 2. - С. 67-71, DOI 10.21046/2070-7401-2017-14-2-61-71. - Библиогр.: 22 . - ISSN 2070-7401
   Перевод заглавия: Microwave radiometric method for measuring soil temperature in Arctic tundra
Кл.слова (ненормированные):
микроволновая радиометрия -- температура почвы -- арктическая зона -- Microwave radiometry -- Soil measurements -- Temperature measurement -- Arctic region
Аннотация: В данной работе представлены результаты дистанционного зондирования температуры почвенного покрова на тестовом участке п-ва Ямал с использованием угловых зависимостей радиояркостной температуры, наблюдаемых космическим аппаратом SMOS на частоте 1,4 ГГц. Расположение пикселя зондирования космического аппарата SMOS было выбрано в районе между метеостанциями Марресале и Васькины дачи на п-ве Ямал. Исследование охватывает период с 22 октября 2012 г. по 10 мая 2014 г. для мерзлого состояния почвенного покрова. Метод восстановления температуры почвы основан на решении обратной задачи путем минимизации нормы невязки между наблюдаемыми и рассчитанными значениями радиояркостной температуры. Расчет радиояркостной температуры производился с использованием полуэмпирической модели, учитывающей затухание волны в снежном покрове, диэлектрическую проницаемость почвенного покрова, на основе модели комплексной диэлектрической проницаемости почвы с высоким содержанием органического вещества. Модель комплексной диэлектрической проницаемости почвенного покрова была создана в лабораторных условиях с использованием методов диэлектрической спектроскопии с использованием почвенных образцов отобранных на тестовом участке п-ва Ямал. Среднеквадратическое отклонение и коэффициент детерминации между восстановленными и измеренными значениями температуры почвы оказались равны 4,5°С и 0,59 соответственно. Полученный результат указывает на перспективность использования поляриметрических угловых наблюдений радиояркостной температуры на частоте 1,4 ГГц для измерения температуры арктической тундровой почвы.
In this paper, the results of radiothermal remote sensing of soil temperature at a test site on the Yamal Peninsula using full-polarimetry multi-angular brightness temperature (BT) observations at the frequency of 1.4 GHz are presented. The BT data were obtained from the Soil Moisture and Ocean Salinity (SMOS) satellite with the SMOS footprint near the Polar Weather Station Marresale and Vaskiny Dachi, the Russian Federation. The SMOS data covered the period from October 22, 2012 to May 10, 2014. The method to retrieve the soil temperature was based on solving an inverse problem by minimizing the norm of the residuals between the observed and predicted values of BT. The calculation of BT was performed using a semi-empirical model of radiothermal emission which incorporated an attenuation of microwaves in snow pack and a temperature-dependent multi-relaxation spectral dielectric model (TD MRSDM) for organic-rich tundra soil. The TD MRSDM was specifically designed on the base of laboratory measurements of complex permittivity of organic-rich soil samples collected at the test site on the Polar Weather Station Marresale. As a result, in case of frozen soil, the values of root-mean-square error (RMSE) and determination coefficient between the retrieved and measured soil temperatures were determined to be 4.5°C and 0.59, respectively. These results indicate the perspectives of using full-polarimetric multi-angular BT observations in the L-band for the purpose of measuring soil temperature in the Arctic region.

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Держатели документа:
L.V. Kirensky Institute of Physics SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Музалевский, Константин Викторович; Muzalevskiy, K. V.; Ружичка, Зденек; Ruzicka, Z.; Mironov, V. L.
}
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17.

    Temperature- and texture-dependent dielectric model for frozen and thawed mineral soils at a frequency of 1.4 GHz / V. L. Mironov [et al.] // Remote Sens. Environ. - 2017. - Vol. 200. - P. 240-249, DOI 10.1016/j.rse.2017.08.007. - Cited References: 27. - The study was supported by a grant from the Russian Foundation for Basic Research (project № 16-05-00572). . - ISSN 0034-4257
   Перевод заглавия: Температурно- и гранулометрически-зависимая диэлектрическая модель мерзлых и талых минеральных почв на частоте 1,4 ГГц
Кл.слова (ненормированные):
Frozen mineral soils -- Dielectric measurements -- Dielectric model -- Unfrozen bound water -- Moistened ice -- 1.4 GHz
Аннотация: A single-frequency dielectric model at 1.4 GHz for frozen mineral soils was developed, with the temperature and gravimetric clay content varying from − 1 to − 30°C and from 9.1 to 41.3%, respectively. The model is based on the refractive mixing dielectric model and the dielectric data measured for the three typical soils collected in the Yamal tundra. The refractive mixing dielectric model was applied to fit the measured dielectric data as a function of soil moisture at a number of fixed temperatures. As a result, the parameters of the developed model were derived as a function of temperature and texture. This set of parameters consists of the maximum gravimetric fraction of unfrozen bound water and the values of the complex refractive indexes relating to soil solids, unfrozen bound water, and moistened ice. The developed model for frozen mineral soils in conjunction with the previously developed by us dielectric model for thawed mineral soils is considered as an integral dielectric model which is applicable for permittivity calculations of soil in both thawed and frozen states. The developed integral dielectric model for frozen and thawed mineral soils was validated using the dielectric data for five measured soils, and the statistical errors were estimated in terms of the root mean square error and the determination coefficient. In addition, the only known in the literature dielectric model for frozen soils suggested by Zhang was validated based on dielectric data for soils measured in this research. The comparative analysis proved substantially better accuracy of predictions in the case of the developed model as compared to those related to the Zhang model.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Russian Federation
Altai State University, Russian Federation

Доп.точки доступа:
Mironov, V. L.; Миронов, Валерий Леонидович; Kosolapova, L. G.; Косолапова, Людмила Георгиевна; Lukin, Y. I.; Лукин, Юрий Иванович; Karavaysky, A. Yu.; Каравайский, Андрей Юрьевич; Molostov, I. P.
}
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18.

    Magneto-ellipsometry as a powerful technique for investigating magneto-optical structures properties / O. Maximova [et al.] // J. Magn. Magn. Mater. - 2017. - Vol. 440. - P. 153-156, DOI 10.1016/j.jmmm.2016.12.073. - Cited References:20. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project No 1642-243058. The work was supported by the Russian Foundation for Basic Research, Grant No. 16-32-00209mol_a, Grant No. 14-02-01211, The Complex program of SB RAS No II.2P, project 03582015-0004, the Ministry of Education and Science of the RF (State task No. 16.663.2014K), grant Scientific School 7559.2016.2. . - ISSN 0304-8853. - ISSN 1873-4766
   Перевод заглавия: Магнито-эллипсометрия как мощный инструмент для исследования магнитооптических свойств структур

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter

Кл.слова (ненормированные):
Magneto-optical Kerr effect -- Ellipsometry -- In situ measurements
Аннотация: In this work we report on new magneto-ellipsometry set-up that allows to grow thin films and nanostructures by ultrahigh vacuum thermal evaporation as well as to conduct in situ measurements during the growth in order to analyze and control nanostructures properties. Ellipsometry and transverse magneto-optical Kerr effect measurements can be performed in situ inside this set-up. A uniform magnetic field of high intensity (more than 1 kOe) can be applied to samples inside the vacuum chamber. Also, we report on the developed method of data interpretation that is the base of the set-up software. Thus, we present a powerful tool for nanostructures synthesis and characterization.

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Доп.точки доступа:
Maximova, O. A.; Максимова, Ольга Александровна; Kosyrev, N. N.; Косырев, Николай Николаевич; Yakovlev, I. A.; Яковлев, Иван Александрович; Shevtsov, D. V.; Шевцов, Дмитрий Валентинович; Lyashchenko, S. A.; Лященко, Сергей Александрович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [1642-243058]; Russian Foundation for Basic Research [16-32-00209mol_a, 14-02-01211]; Ministry of Education and Science of the RF [16.663.2014K, 7559.2016.2]; Complex program of SB RAS [II.2P, 03582015-0004]; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН
}
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19.

    Velikanov, D. A.
    High-sensitive magnetic measurements at cryogenic temperatures / D. A. Velikanov // Магнитные материалы. Новые технологии : тез. докл. VIII Байкал. междунар. конф. BICMM-2018 / чл. прогр. ком. R. S. Iskhakov [et al.]. - Иркутск, 2018. - P. 180. - Библиогр.: 1 . - ISBN 978-5-00133-051-6
   Перевод заглавия: High-sensitive magnetic measurements at cryogenic temperatures

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Доп.точки доступа:
Iskhakov, R. S. \чл. прогр. ком.\; Исхаков, Рауф Садыкович; Ovchinnikov, S. G. \чл. прогр. ком.\; Овчинников, Сергей Геннадьевич; Aplesnin, S. S. \чл. прогр. ком.\; Аплеснин, Сергей Степанович; Balaev, D. A. \чл. прогр. ком.\; Балаев, Дмитрий Александрович; Великанов, Дмитрий Анатольевич; Байкальская международная конференция "Магнитные материалы. Новые технологии"(8 ; 2018 ; авг. ; 24-28 ; Иркутск); "Магнитные материалы. Новые технологии", Байкальская международная конференция(8 ; 2018 ; авг. ; 24-28 ; Иркутск); "Magnetic materials. New tecnologies", Baikal International Conference(8 ; 2018 ; Aug. 24-28 ; Irkutsk); Иркутский государственный университет
}
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20.

    Соловьев, Платон Николаевич.
    Измерение магнитных характеристик тонких пленок пермаллоя методом ферромагнитного резонанса на различных частотах / П. Н. Соловьев, Б. А. Беляев, Г. В. Скоморохов // Магнитные материалы. Новые технологии : тез. докл. VIII Байкал. междунар. конф. BICMM-2018 / чл. прогр. ком. R. S. Iskhakov [et al.]. - Иркутск, 2018. - С. 185 . - ISBN 978-5-00133-051-6
   Перевод заглавия: Measurements of thin permalloy films magnetic characteristics using ferromagnetic resonance on various frequencies

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Держатели документа:
Институт физики им. Л.В. Киренского СО РАН

Доп.точки доступа:
Iskhakov, R. S. \чл. прогр. ком.\; Исхаков, Рауф Садыкович; Ovchinnikov, S. G. \чл. прогр. ком.\; Овчинников, Сергей Геннадьевич; Aplesnin, S. S. \чл. прогр. ком.\; Аплеснин, Сергей Степанович; Balaev, D. A. \чл. прогр. ком.\; Балаев, Дмитрий Александрович; Беляев, Борис Афанасьевич; Belyaev, B. A.; Скоморохов, Георгий Витальевич; Skomorokhov, G. V.; Solovev, P. N.; Байкальская международная конференция "Магнитные материалы. Новые технологии"(8 ; 2018 ; авг. ; 24-28 ; Иркутск); "Магнитные материалы. Новые технологии", Байкальская международная конференция(8 ; 2018 ; авг. ; 24-28 ; Иркутск); "Magnetic materials. New tecnologies", Baikal International Conference(8 ; 2018 ; Aug. 24-28 ; Irkutsk); Иркутский государственный университет
}
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