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Zeeman effect and stark splitting of the electronic states of the rare-earth ion in the paramagnetic terbium garnets Tb3Ga5O12 and Tb3Al5O12 / U. V. Valiev [et al.] // Phys. Solid State. - 2007. - Vol. 49, Is. 1. - P. 91-98, DOI 10.1134/S1063783407010167. - Cited References: 14 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
YTTRIUM-ALUMINUM-GARNET
   SELECTIVE POLARIZED SPECTROSCOPY
   CRYSTAL-FIELD ANALYSIS
   GALLIUM GARNET
Аннотация: The Zeeman effect in the F-7(6) - D-5(4) absorption band of the Tb3+ ion in the paramagnetic garnets Tb3Ga5O12 and Tb3Al5O12 was Studied. The field dependences of the Zeeman splitting of some absorption lines arc found to exhibit unusual behavior: as the magnetic field increases, the hand splitting decreases rather than increases. Symmetry analysis relates these lines to 4f - 4f electron transitions of the doublet-quasi-doublet or quasi-doublet-doublet type, for which the field dependences of the splitting differ radically from the well-known field dependences of the Zeeman splitting for quasi-doublet-quasi-doublet or quasi-doublet-singlet transitions in a longitudinal magnetic field.

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Держатели документа:
Natl Univ Uzbekistan, Tashkent 700174, Uzbekistan
Univ Texas, San Antonio, TX 78249 USA
ARL, Adelphi Lab Ctr, Adelphi, MD 20783 USA
Natl Acad Sci Ukraine, Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
National University of Uzbekistan, Tashkent 700174, Uzbekistan
University of Texas at San Antonio, San Antonio, TX 78249-0697, United States
ARL, Adelphi Laboratory Center, Adelphi, MD 20783-1197, United States
Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, pr. Lenina 47, Kharkov, 61103, Ukraine
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Valiev, U. V.; Gruber, J. B.; Sardar, D. K.; Zandi, B.; Kachur, I. S.; Mukhammadiev, A. K.; Piryatinskaya, V. G.; Sokolov, V. Y.; Edelman, I. S.; Эдельман, Ирина Самсоновна
}
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Unusual Valence States of Manganese Ions in Gadolinium Gallium Aluminum Borate Single Crystals [Text] / A. S. Aleksandrovsky, L. N. Bezmaternykh [et al.] // Известия высших учебных заведений. Физика. - 2008. - Т. 51, № 10/2. - P115-119

Доп.точки доступа:
Aleksandrovsky, A.S.; Bezmaternykh, L.N.; Bovina, A.F.; Gudim, I.A.; Kharlamova, S.A.; Krylov, A.S.; Melnikova, S.V.; Temerov, V.Ye.
}
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    The electronic and optical properties of a narrow-band red-emitting nanophosphor K2NaGaF6:Mn4+ for warm white light-emitting diodes / C. Jiang [et al.] // J. Mater. Chem. C. - 2018. - Vol. 6, Is. 12. - P. 3016-3025, DOI 10.1039/c7tc05098d. - Cited References: 55. - We acknowledge the financial support received from the Program for Innovative Research Team in University of Ministry of Education of China (Grant No. IRT_17R38), the Key Program of Guangzhou Scientific Research Special Project (Grant No. 201607020009), the National Natural Science Foundation of China (Grant No. 51672085, 51322208, 3160440), and the Fundamental Research Funds for the Central Universities. M. G. Brik acknowledges the supports received from the Recruitment Program of High-end Foreign Experts (Grant No. GDW20145200225), the Programme for the Foreign Experts offered by Chongqing University of Posts and Telecommunications, Ministry of Education and Research of Estonia, (Project PUT430) and European Regional Development Fund (Project TK141), and the Guest Professorship at Kyoto University (Prof. S. Tanabe laboratory). The first-principles calculations were carried out using the resources provided by the Wroclaw centre for Networking and Supercomputing (http://wcss.pl; Grant No. WCSS#10117290). . - ISSN 2050-7534
   Перевод заглавия: Электронные и оптические свойства узкополосного нанолюминофора K2NaGaF6:Mn4+ , излучающего красный свет, для белых светодиодов излучающих теплый белый свет
Кл.слова (ненормированные):
Energy efficiency -- Gallium compounds -- Light emission -- Light emitting diodes -- Manganese -- Manganese compounds -- Optical properties -- Phosphors -- Precipitation (chemical) -- Quenching -- Rietveld refinement -- Sodium compounds
Аннотация: Recently, as a key red component in the development of warm white light-emitting diodes (WLEDs), Recently, as a key red component in the development of warm white light-emitting diodes (WLEDs), Mn4+-doped fluorides with narrow red emission have sparked rapidly growing interest because they improve color rendition and enhance the visual energy efficiency. Herein, a red nanophosphor, K2NaGaF6:Mn4+, with a diameter of 150-250 nm has been synthesized using a simple co-precipitation method. Rietveld refinement reveals that it crystallizes in the space group Fm3m with the cell parameter a = 8.25320(4) Å. The exchange charge model (ECM) has been used to calculate the energy levels of Mn4+ ions in K2NaGaF6, which match well with the experimental spectra. The as-synthesized phosphor exhibits a narrow red emission at around 630 nm (spin-forbidden 2Eg → 4A2 transition of Mn4+ ions) when excited at 365 nm (4A2g → 4T1g) and 467 nm (4A2g → 4T2g), with a quantum efficiency (QE) of 61% and good resistance to thermal quenching. Based on the structure, the formation mechanism of ZPL has been discussed. In addition, the concentration-dependent decay curves of Mn4+ in K2NaGaF6 were fitted using the Inokuti-Hirayama model, suggesting that the dipole-dipole interactions determine the concentration quenching. Finally, encouraged by the good performance, a warm LED with a CRI of 89.4 and CCT of 3779 K was fabricated by employing the title nanophosphor as the red component. Our findings suggest that K2NaGaF6:Mn4+ can be a viable candidate for the red phosphor used in warm WLEDs.

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Держатели документа:
China-Germany Research Center for Photonic Materials and Device, State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, School of Materials Science and Engineering, South China University of Technology, Guangzhou, China
School of Applied Physics and Materials, Wuyi University Jiangmen, Guangdong, China
College of Mathematics and Physics, Chongqing University of Posts and Telecommunications, Chongqing, China
Institute of Physics, University of Tartu, W. Ostwald Str. 1, Tartu, Estonia
Institute of Physics, Jan Dlugosz University, Armii Krajowej 13/15, Cz?stochowa, Poland
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong

Доп.точки доступа:
Jiang, C.; Brik, M. G.; Li, L.; Peng, J.; Wu, J.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Wong, K. -L.; Peng, M.
}
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Synthesis, structure, and thermophysical properties of EuGaGe2O7 / L. T. Denisova, M. S. Molokeev, L. A. Irtyugo [et al.] // Inorg. Mater. - 2020. - Vol. 56, Is. 8. - P. 854-858, DOI 10.1134/S002016852008004X. - Cited References: 18 . - ISSN 0020-1685. - ISSN 1608-3172

РУБ Materials Science, Multidisciplinary
Рубрики:
TEMPERATURE HEAT-CAPACITY
THERMODYNAMIC PROPERTIES
CRYSTAL-STRUCTURE
Кл.слова (ненормированные):
europium gallium germanate -- solid-state synthesis -- differential scanning calorimetry -- heat capacity -- structure -- thermodynamic properties
Аннотация: The europium gallium germanate EuGaGe2O7 has been prepared by solid-state reaction in air in the temperature range 1273–1473 K using a stoichiometric mixture of Eu2O3, Ga2O3, and GeO2. Its crystal structure has been determined by X-ray diffraction (sp. gr. P21/c, a = 7.1693(7) Å, b = 6.57008(6) Å, c = 12.7699(1) Å, β = 117.4522(5)°, V = 533.768(8) Å3). The heat capacity of polycrystalline samples has been determined by differential scanning calorimetry in the temperature range 350–1053 K and the experimental data have been used to calculate the thermodynamic properties (enthalpy increment, entropy change, and reduced Gibbs energy change) of EuGaGe2O7.

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Публикация на русском языке Синтез, структура и теплофизические свойства EuGaGe2O7 [Текст] / Л. Т. Денисова, М. С. Молокеев, Л. А. Иртюго [и др.] // Неорган. матер. - 2020. - Т. 56 № 8. - С. 901-905

Держатели документа:
Siberian Fed Univ, Inst Nonferrous Met & Mat Sci, Svobodnyi Pr 79, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, Fed Res Ctr, Kirensky Inst Phys,Krasnoyarsk Sci Ctr, Akademgorodok 50-38, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Ul Akad Kirenskogo 28-12 B, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Baikov Inst Met & Mat Sci, Leninskii Pr 49, Moscow 119991, Russia.

Доп.точки доступа:
Denisova, L. T.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Irtyugo, L. A.; Beletskii, V. V.; Kargin, Yu. F.; Denisov, V. M.
}
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Synthesis, Crystal Structure and Thermodynamic Properties of LuGaTi2O7 / L. T. Denisova, M. S. Molokeev, L. G. Chumilina [et al.] // Inorg. Mater. - 2020. - Vol. 56, Is. 12. - P. 1242-1247, DOI 10.1134/S0020168520120055. - Cited References: 25 . - ISSN 0020-1685
Кл.слова (ненормированные):
lutetium gallium titanate -- mixed oxide compounds -- high-temperature heat capacity -- thermodynamic properties
Аннотация: Single-phase LuGaTi2O7 samples have been prepared by solid-state reaction in a starting mixture of Lu2O3, Ga2O3, and TiO2 via sequential firing in air at temperatures of 1273 and 1573 K. The crystal structure of the lutetium gallium dititanate has been determined by the Rietveld method (profile analysis of X-ray diffraction patterns of polycrystalline powders): sp. gr. Pcnb; a = 9.75033(13) Å, b = 13.41425(17) Å, c = 7.29215(9) Å, V = 957.32(2) Å3, d = 6.28 g/cm3. The heat capacity of LuGaTi2O7 has been determined as a function of temperature by differential scanning calorimetry in the range 320–1000 K. The Cp(T) data thus obtained have been used to calculate the principal thermodynamic functions of the oxide compound.

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Публикация на русском языке Синтез, кристаллическая структура и термодинамические свойства LuGaTi2O7 [Текст] / Л. Т. Денисова, М. С. Молокеев, Л. Г. Чумилина [и др.] // Неорган. матер. - 2020. - Т. 56 № 12. - С. 1311-1316

Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk Scientific Center (Federal Research Center), Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, 119991, Russian Federation
Institute of Metallurgy, Ural Branch, Russian Academy of Sciences, Yekaterinburg, 620016, Russian Federation

Доп.точки доступа:
Denisova, L. T.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Chumilina, L. G.; Kargin, Y. F.; Denisov, V. M.; Ryabov, V. V.
}
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Structure and thermodynamic properties of the SmGaGe2O7 oxide / L. T. Denisova, M. S. Molokeev, L. A. Irtyugo [et al.] // Phys. Solid State. - 2020. - Vol. 62, Is. 2. - P. 384-387, DOI 10.1134/S1063783420020109. - Cited References: 10. - This study was carried out within the state assignment of the Ministry of Science and Higher Education of the Russian Federation to the Siberian Federal University in 2017–2019, project no. 4.8083.2017/8.9 “Formation of a Data Bank of Thermodynamic Characteristics of the Complex-Oxide Multifunctional Materials Containing Rare and Scattered Elements.” . - ISSN 1063-7834
Кл.слова (ненормированные):
samarium gallium germanate -- structure -- heat capacity
Аннотация: The SmGaGe2O7 oxide material has been obtained from initial Sm2O3, Ga2O3, and GeO2 oxides by solid-phase synthesis with annealing in air in the temperature range of 1273–1473 K. The structure of the investigated germanate (sp. gr. P21/c, a = 7.18610(9) Å, b = 6.57935(8) Å, and c = 12.7932(2) Å) has been established by X-ray diffraction and the high-temperature heat capacity has been determined by differential scanning calorimetry. Using the experimental data on Cp = f(T), the thermodynamic properties of the compound have been calculated.

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Публикация на русском языке Структура и термодинамические свойства SmGaGe2O7 [Текст] / Л. Т. Денисова, М. С. Молокеев, Л. А. Иртюго [и др.] // Физ. тверд. тела. - 2020. - Т. 62 Вып. 2. - С. 332-335

Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Denisova, L. T.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Irtyugo, L. A.; Beletskii, V. V.; Belousova, N. V.; Denisov, V. M.
}
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Spin-glass state in CuGa2O4 / G. A. Petrakovskii [et al.] // Phys. Rev. B. - 2001. - Vol. 63, Is. 18. - Ст. 184425, DOI 10.1103/PhysRevB.63.184425. - Cited References: 28 . - ISSN 0163-1829

РУБ Physics, Condensed Matter
Рубрики:
TRANSITION
Кл.слова (ненормированные):
copper -- gallium -- glass -- oxygen -- acceleration -- article -- magnetism -- measurement -- molecular dynamics -- phase transition
Аннотация: Magnetic susceptibility, magnetization, specific-heat, and positive muon spin relaxation (?SR) measurements have been used to characterize the magnetic ground state of the spinel compound CuGa2O4. We observe a spin-glass transition of the S = 1/2 Cu2+ spins below Tf = 2.5 K characterized by a cusp in the susceptibility curve which is suppressed when a magnetic field is applied. We show that the magnetization of CuGa2O4 depends on the magnetic history of the sample. Well below Tf, the muon signal resembles the dynamical Kubo-Toyabe expression reflecting that the spin freezing process in CuGa2O4 results in a Gaussian distribution of the magnetic moments. By means of Monte Carlo simulations, we obtain the relevant exchange integrals between the Cu2+ spins in this compound.

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Держатели документа:
Institute of Physics, Academy of Sciences, Siberian Branch, 660036 Krasnoyarsk, Russian Federation
Laboratory for Neutron Scattering, Paul Scherrer Institute, ETH Zurich, CH-5232 Villigen PSI, Switzerland
Laboratory for Muon-Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
Instituto de Ciencia de Materiales de Aragon, CSIC-Universidad de Zaragoza, Ciudad Universitaria, 50009 Zaragoza, Spain
Kamerlingh Onnes Laboratorium, Leiden University, Netherlands

Доп.точки доступа:
Petrakovskii, G. A.; Петраковский, Герман Антонович; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Aplesnin, S. S.; Аплеснин, Сергей Степанович; Roessli, B.; Semadeni, F.; Amato, A.; Baines, C.; Bartolome, J.; Evangelisti, M.
}
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Research of features magnetic permeability and domain structures in Fe 2O3:GA crystals near the morin transition / A. V. Chzhan [et al.] // Solid State Phenomena. - 2009. - Vol. 152-153. - P29-32, DOI 10.4028/www.scientific.net/SSP.152-153.29 . - ISSN 1012-0394
Кл.слова (ненормированные):
Antiferromagnetic -- Domain structure -- Hematite -- Morin transition -- Weakly ferromagnetic -- Antiferromagnetic materials -- Antiferromagnetism -- Capillarity -- Crystal impurities -- Crystals -- Ferromagnetic materials -- Ferromagnetic resonance -- Ferromagnetism -- Gallium -- Hematite -- Iron ores -- Magnetic permeability -- Oxide minerals -- Permanent magnets -- Antiferromagnetism -- Crystal impurities -- Ferromagnetic materials -- Ferromagnetism -- Gallium -- Hematite -- Iron compounds -- Magnetic materials -- Magnetic permeability -- Magnetism -- AFM -- Antiferromagnetic -- Antiferromagnetic domains -- Antiferromagnetics -- Basal planes -- Domain configurations -- Domain structure -- Morin transitions -- Multi-layered structure -- Weakly ferromagnetic -- Magnetic domains -- Magnetic domains
Аннотация: Specially picked up web-chamber is used for visualization of domain structure in hematite. An analysis of domain configuration shows, that domain structure of hematite in a basal plane represents multilayered structure which contains domains both in paralleled thickness and in the parallel basal planes. The temperature features of magnetic permeability and domain structures in Fe2O3:Ga crystals near the Morin transition are investigated. Observable changes of magnetic permeability and changes in domain structure confirm that transition from AFM to WFM occurs in the hematite with Ga impurity as transition of the first sort. Results of research of antiferromagnetic and weakly ferromagnetic resonances (AFMR and WFMR) in these compounds are presented.

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Держатели документа:
Kirenskii Institute of Physics, Siberian Branch of RAS, Institute of Physics, Krasnoyarsk 660036Academgorodok, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Chzhan, A.V.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Isaeva, T. N.; Patrin, G. S.; Патрин, Геннадий Семёнович; Moscow International Symposium on Magnetism(4 ; 2008 ; Jun. ; Moscow)
}
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Origin of color centers in the flux-grown europium gallium garnet / A. S. Aleksandrovsky [et al.] // J. Appl. Phys. - 2008. - Vol. 103, Is. 8. - Ст. 83102, DOI 10.1063/1.2902365. - Cited References: 7 . - ISSN 0021-8979

РУБ Physics, Applied
Рубрики:
SPECTRA
IONS
Кл.слова (ненормированные):
Absorption -- Europium alloys -- Garnets -- Ultraviolet radiation -- Calcium-free flux -- Flux-grown europium gallium garnet -- Color centers
Аннотация: Europium gallium garnet (EuGG) single crystals were grown from fluxes with various contents. Optical absorption spectra of EuGG grown from a flux containing calcium show an additional band in the ultraviolet and blue regions of the spectra as compared to the case of a calcium-free flux. Mossbauer spectra of the samples grown from the fluxes with different additives show no signs of other valence states of the europium ions except for 3+. However, they indicate changes in the crystal field due to the entrance of additive ions. The nature of the additional absorption must be the same as that for calcium-doped gadolinium gallium garnet, i.e., anion vacancies. Mossbauer isotope shifts and quadrupole splitting for EuGG are determined. (C) 2008 American Institute of Physics.

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Держатели документа:
[Aleksandrovsky, A. S.
Arkhipkin, V. G.
Bezmaternykh, L. N.
Gudim, I. A.
Krylov, A. S.] LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
[Aleksandrovsky, A. S.
Arkhipkin, V. G.
Bezmaternykh, L. N.
Gudim, I. A.
Krylov, A. S.] Siberian Fed Univ, Krasnoyarsk 660079, Russia
[Vagizov, F.] Texas A&M Univ, Dept Phys, College Stn, TX 77840 USA
ИФ СО РАН
L. V. Kirensky Institute of Physics, Siberian Federal University, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Department of Physics, Texas A and M University, College Station, TX 77840, United States

Доп.точки доступа:
Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Gudim, I. A.; Гудим, Ирина Анатольевна; Krylov, A. S.; Крылов, Александр Сергеевич; Vagizov, F.
}
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10.

Optical and Mossbauer Spectroscopy of Europium Gallium Garnet Single Crystals Grown from Fluxes of Different Content / A. S. Aleksandrovsky, V. G. Arkhipkin [et al.] // Известия высших учебных заведений. Физика. - 2008. - Т. 51, № 10/2. - P110-114

Доп.точки доступа:
Aleksandrovsky, A.S.; Arkhipkin, V.G.; Bezmaternykh, L.N.; Gudim, I.A.; Krylov, A.S.; Vagizov, F.
}
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11.

Multicomponent flux growth and composition control of Cu2MnBO5:Ga ludwigites / E. Moshkina, A. Krylov, D. Kokh [et al.] // CrystEngComm. - 2022. - Vol. 24, Is. 19. - P. 3565-3575, DOI 10.1039/d2ce00258b. - Cited References: 26. - This study was supported by the Russian Science Foundation (Grant No. 21-72-00130). The Raman, X-ray, and EDX data were obtained using the analytical equipment of the Krasnoyarsk Regional Center of Research Equipment of the Federal Research Center “Krasnoyarsk Science Center SB RAS” . - ISSN 1466-8033
Кл.слова (ненормированные):
Bismuth compounds -- Boron compounds -- Copper compounds -- Crystal symmetry -- Energy dispersive spectroscopy -- Gallium -- Manganese oxide -- Positive ions -- Sodium compounds
Аннотация: To reach the concentration phase boundary between antiferromagnetic Cu2GaBO5 and ferrimagnetic Cu2MnBO5 ludwigites, solid solutions Cu2Mn1−xGaxBO5 (x = 0.05, 0.1, 0.15, 0.175) were grown by the flux technique using a multi-component solvent based on Bi2Mo3O12 with the addition of Na2B4O7 which significantly influenced the crystal formation and cation composition of the studied compounds. The content of the flux system was corrected taking into account the earlier established relationship of the partition coefficients of Mn2O3 and Ga2O3. The influence of the solvent components on the ludwigite crystallization was analyzed. The maximum size of the grown crystal was 1 × 1 × 4 mm3. The structure and cation composition of the grown compounds were studied using X-ray (X-ray diffraction, EDX (energy-dispersive X-ray spectroscopy)) and vibrational (Raman) spectroscopy techniques. The phase boundary of Cu2MnBO5–Cu2GaBO5 was found to be in the concentration range of x = 0.15–0.175, corresponding to a change in the monoclinic axis direction and a leap in the lattice parameters. The symmetry evolution of metal–oxygen octahedra for four nonequivalent cation positions was analyzed, and the unique crystal structure of Cu2MnBO5 demonstrated high rigidity relative to the introduction of Ga3+ cations. The polarized Raman spectra of monoclinic ludwigites were obtained and studied for the first time. A comparison of the spectra of the studied samples in both phases and orthorhombic ludwigites was made. A number of spectral features due to the monoclinic distortions in the crystal were found. In agreement with the Raman experiment, the concentration phase boundary was close to 0.15.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian State University of Science and Technologies, Krasnoyarsk, 660037, Russian Federation
Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
St Petersburg University, St Petersburg, 199034, Russian Federation

Доп.точки доступа:
Moshkina, E. M.; Мошкина, Евгения Михайловна; Krylov, A. S.; Крылов, Александр Сергеевич; Kokh, D.; Shabanova, K.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Bovina, A. F.; Бовина, Ася Федоровна; Plyaskin, M.; Пляскин, Михаил Е.; Rostovtsev, N.; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич
}
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12.

Mechanochemical synthesis of intermetallic compounds in the gallium-iridium system / E. A. Pavlov [et al.] // Russ. Metall. - 2018. - Is. 8. - P. 728-732, DOI 10.1134/S0036029518080141. - Cited References: 18. - This work was performed in terms of project no. 1622/17 of the Krasnoyarsk Plant of Nonferrous Metals and the Institute of Solid State Chemistry and Mechanochemistry. . - ISSN 0036-0295. - ISSN 1555-6255

РУБ Metallurgy & Metallurgical Engineering
Рубрики:
ALUMINUM
Кл.слова (ненормированные):
mechanochemical synthesis -- intermetallic compounds -- gallium -- iridium -- complex compounds of iridium
Аннотация: The interaction between a solid inert metal (Ir) and an active liquid metal (Ga) during mechanical activation in a high-energy planetary mill is studied by X-ray diffraction and scanning electron microscopy with EDS-apparatus for high-resolution energy dispersive X-ray microanalysis. The influence of mechanical activation conditions on the formation of GaxIry intermetallic compounds and GaxIry/Ir composites and on their solubility in various acids is investigated. Being a surfactant for iridium, gallium propagates along the grain boundaries of polycrystalline iridium particles during mechanical activaiton and, hence, sharply decreases their strength. As a result of strong mechanical deformation during activation, the contact surface area between the solid and liquid metals, where the intermetallic compounds form intensely, increases sharply. As a result of treatment of the products of mechanical activaiton by a mixture of concentrated hydrochloric and nitric acids, iridium (>30%) from passes into an acid solution and forms HxIrCly complex compounds, which can interact with bases to form soluble complex salts.

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Публикация на русском языке Механохимический синтез интерметаллических соединений в системе галлий-иридий [Текст] / Е. А. Павлов [и др.] // Расплавы. - 2018. - № 3. - С. 291-298

Держатели документа:
OAO Krasnoyarsk Plant Nonferrous Met, Krasnoyarsk 660027, Russia.
Russian Acad Sci, Siberian Branch, Fed Res Ctr, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Siberian Branch, Inst Solid State Chem & Mechanochem, Novosibirsk 630128, Russia.
Russian Acad Sci, Ural Branch, Inst Met, Ekaterinburg 620016, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Pavlov, E. A.; Chuprov, I. V.; Nikulin, M. V.; Mal'tsev, E. V.; Pshenichnaya, A. A.; Пшеничная, Анастасия Александровна; Grigoreva, T. F.; Pastukhov, E. A.; Skuratov, A. P.; Lyakhov, N. Z.
}
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13.

Magnetic resonance in a gallium-doped Cu–Cr–S structure / A. M. Vorotynov [et al.] // Phys. Solid State. - 2016. - Vol. 58, Is. 4. - P. 678-681, DOI 10.1134/S1063783416040314. - Cited References: 9 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
Ferromagnetic spinels
Аннотация: A layered Cu–Cr–S structure doped with Ga ions and consisting of single-crystal CuCrS2 layers, embedded with thin plates of spinel phases CuCr2S4 and CuGaxCr2–xS4, has been studied using the magnetic resonance and magnetic susceptibility methods. The Curie temperature and the saturation magnetization of the spinel phases of the samples have been determined. The spinel phase layer thickness has been estimated. © 2016, Pleiades Publishing, Ltd.

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Публикация на русском языке Магнитный резонанс в структуре Cu-Cr-S, допированной галлием [Текст] / А. М. Воротынов [и др.] // Физ. тверд. тела : Физико-технический институт им. А. Ф. Иоффе РАН, 2016. - Т. 58 Вып. 4. - С. 660-663

Держатели документа:
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok-50, Building 38, Krasnoyarsk, Russian Federation
Siberian Federal University, Svobodny pr. 79, Krasnoyarsk, Russian Federation
Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, ul Akademika Lavrent’eva 3, Novosibirsk, Russian Federation

Доп.точки доступа:
Vorotynov, A. M.; Воротынов, Александр Михайлович; Pankrats, A. I.; Панкрац, Анатолий Иванович; Abramova, G. M.; Абрамова, Галина Михайловна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Bovina, A. F.; Бовина, Ася Федоровна; Sokolov, V. V.; Filatova, I. Y.
}
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14.

Investigation of the Magnetic Properties of Ludwigites / R. M. Eremina [et al.] // Bull. Russ. Acad. Sci. Phys. - 2019. - Vol. 83, Is. 7. - P. 912-914, DOI 10.3103/S1062873819070141. - Cited References: 6. - This work was supported by the Russian Foundation for Basic Research, project no. 17-02-00953. . - ISSN 1062-8738
Кл.слова (ненормированные):
Aluminum compounds -- Copper compounds -- Gallium compounds -- Magnetic susceptibility -- Metal ions -- Single crystals -- Temperature distribution -- X ray powder diffraction
Аннотация: Single crystals of Cu2AlBO5 and Cu2GaBO5 copper oxyborates are synthesized via solution-melt crystallization and subjected to X-ray diffraction analysis. Parameters of the crystal lattice and the positions of atoms in a unit cell are determined. Copper ions form a structural chain along axis а in Cu2AlBO5 and Cu2GaBO5. Temperature dependences of the magnetic susceptibility are measured. The obtained curves feature kinks at Т = 2.4 (Cu2AlBO5) and 4.1 K (Cu2GaBO5). © 2019, Allerton Press, Inc.

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Публикация на русском языке Исследование магнитных свойств людвигитов [Текст] / Р. М. Еремина [и др.] // Изв. РАН. Сер. физич. - 2019. - Т. 83 № 7. - С. 999-1002

Держатели документа:
Zavoisky Physical-Technical Institute, Kazan Scientific Center, Russian Academy of Sciences, Kazan, 420029, Russian Federation
Kazan Federal University, Kazan, 420008, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russian Federation

Доп.точки доступа:
Eremina, R. M.; Moshkina, E. M.; Мошкина, Евгения Михайловна; Gavrilova, T. P.; Gilmutdinov, I. F.; Sofronova, S. N.; Софронова, Светлана Николаевна; Kiiamov, A. G.
}
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15.

Influence of partial substitution of iron by gallium on optical properties of GdFe3(bo3)4 [Text] / Malakhovskii A.V.Sukhachev A.L.Vasil’ev A.D. [et al.] // Физика диэлектриков (Диэлектрики-2011) : материалы XII Междунарю конф. - СПб. : Изд-во Российского гос. пед. ун-та им. А. И. Герцена, 2011. - Т. 1. - P171-174

Доп.точки доступа:
Malakhovskii, A.V.; Sukhachev, A.L.; Vasil’ev, A.D.; Leont’ev, A.A.; Kartashev, A.V.; Temerov, V.L.; Gudim, I.A.; "Физика диэлектриков", международная конференция(12 ; 2011 ; май ; 23-26 ; Санкт-Петербург)
}
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16.

    Implanted gallium impurity detection in silicon by impedance spectroscopy / D. Tetelbaum, A. Nikolskaya, M. Dorokhin [et al.] // Mater. Lett. - 2022. - Vol. 308, Part B. - Ст. 131244, DOI 10.1016/j.matlet.2021.131244. - Cited References: 11. - This study was supported by the Russian Foundation for Basic Research (grant No. 20-42-243007), Ministry of Science and Higher Education of the Russian Federation (project No. 075-03-2020-191/5), as well as the Government of the Russian Federation within the framework of the Megagrant for the creation of world-class laboratories (No. 075-15-2019-1886) . - ISSN 0167-577X
   Перевод заглавия: Обнаружение имплантированной примеси галлия в кремнии методом импедансной спектроскопии
Кл.слова (ненормированные):
Silicon -- Ion implantation -- Impedance spectroscopy -- Energy levels -- Ion channeling
Аннотация: The results of determining the energy levels of boron-doped silicon implanted with gallium ions by impedance spectroscopy are reported. In the as-implanted sample the boron level remains the same and a second level appears close to the Ga-level reported in literature. In the sample annealed at 1000 °C, two levels are observed neither of which corresponds to the literature values for boron and gallium. It is assumed that in the as-implanted sample this method detects levels of gallium atoms located at a depth where ions penetrate due to the channeling effect, since a large concentration of defects at shallower depths does not allow detection of energy levels due to the Fermi level pinning. Explaining the results for the sample annealed after implantation requires additional research. The main result of this work is to establish the possibility of detecting impurity levels in ion-implanted silicon by impedance spectroscopy even in the absence of subsequent annealing.

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Держатели документа:
Research Institute of Physics and Technology, Lobachevsky University, 23/3 Gagarina Avenue, Nizhny Novgorod, 603022, Russian Federation
Kirensky Institute of Physics, 50 st. Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Tetelbaum, D.; Nikolskaya, A.; Dorokhin, M.; Vasiliev, V.; Smolyakov, D. A.; Смоляков, Дмитрий Александрович; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Baron, F. A.; Барон, Филипп Алексеевич; Tarasov, A. S.; Тарасов, Антон Сергеевич
}
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17.

Ignatchenko, V. A.
High-Frequency Susceptibility of a Superlattice with 2D Inhomogeneities / V. A. Ignatchenko, Y. I. Mankov, D. S. Tsikalov // J. Exp. Theor. Phys. - 2008. - Vol. 107, Is. 4. - P. 603-611, DOI 10.1134/S1063776108100075. - Cited References: 26. - This work was supported in part by grant no. 3818.2008.3 from the President of Russia in accordance with the program supporting leading scientific schools. . - ISSN 1063-7761

РУБ Physics, Multidisciplinary
Рубрики:
SPIN-WAVE SUSCEPTIBILITY
   PERIODIC MULTILAYERS
   LOCALIZATION
   SYSTEMS
   SPECTRUM
   DISORDER
   MEDIA
Кл.слова (ненормированные):
Energy conservation -- Energy gap -- Energy management -- Frequency bands -- Gallium alloys -- Green's function -- Probability density function -- Three dimensional -- Band gaps -- Energy conservation laws -- Green functions -- High frequencies -- Imaginary parts -- Magnon crystals -- Scattered waves -- Superlattice layers -- Wave spectrums -- Phase interfaces
Аннотация: We investigate the high-frequency susceptibility (Green function) of an initially sinusoidal 1D superlattice with 2D phase inhomogeneities that model the deformations of the interfaces between the superlattice layers. For waves propagating along the superlattice axis ( the geometry of a photon or magnon crystal), we have found a peculiar behavior of the imaginary part of the Green function that consists in a significant difference between the peaks corresponding to the edges of the band gap in the wave spectrum. The peak corresponding to the lower-frequency band edge remains essentially unchanged as the root-mean-square fluctuation of the 2D inhomogeneities. 2 increases, while the peak corresponding to the higher-frequency band edge broaden and decreases sharply in height until its complete disappearance with increasing gamma(2). This behavior of the peaks corresponds to a band gap closure mechanism that differs from the traditional one characteristic of 1D and 3D inhomogeneities. These effects can be explained by a peculiarity of the energy conservation laws for the incident and scattered waves for 2D inhomogeneities in a 1D superlattice.

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Держатели документа:
[Ignatchenko, V. A.
Mankov, Yu. I.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Mankov, Yu. I.
Tsikalov, D. S.] Siberian Fed Univ, Krasnoyarsk 660062, Russia
ИФ СО РАН
L.V. Kirenskii Institute of Physics, Russian Academy of Sciences, Siberian Branch, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660062, Russian Federation

Доп.точки доступа:
Mankov, Y. I.; Tsikalov, D. S.; Цикалов, Денис Сергеевич; Игнатченко, Вальтер Алексеевич
}
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18.

    Gd3Ga5O12:Nd3+ crystals for a continuous-wave diode-pumped laser operating in 4F3/2 4I11/2 and 4F3/2 4I13/2 channels / A. A. Kaminskii [et al.] // Crystallogr. Rep. - 2002. - Vol. 47, Is. 2. - P. 308-312, DOI 10.1134/1.1466508. - Cited References: 15 . - ISSN 1063-7745
Рубрики:
GALLIUM GARNET
   EMISSION
Кл.слова (ненормированные):
gadolinium -- gallium -- neodymium -- article -- concentration response -- crystal -- pump -- spectroscopy -- X ray -- x ray topography
Аннотация: Garnet crystals of the composition Gd3Ga5O12:Nd3+ (concentration series CNd = 1-10 at. %) were grown from flux. In terms of spectroscopy, these crystals, unlike those grown from melts, form a medium with a single activator center. For the first time, continuous-wave lasing was excited by diode pumping with the use of Gd3Ga5O12:Nd3+ crystals at the wavelengths ?3 = 1.3315 and ?4 = 1.3370 ?m of the 4F3/2 > 4I13/2 channel and also the simultaneous generation at two wavelengths, ?1 = 1.0621 and ?2 = 1.0600 ?m, of the 4F3/2 > 4I11/2 channel. В© 2002 MAIK "Nauka/Interperiodica".

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Другая переводная версия Crystals Gd3Ga5O12:Nd3+ for a continuous-wave diode-pumped laser operating in 4F3/24I11/2 and 4F3/24I13/2 channels [Текст] / A. A. Kaminskij [и др.] // Kristallogr. - 2002. - Vol. 47 Is. 2.- P.344-349 ; Crystallogr. Rep.

Публикация на русском языке Раствор-расплавные кристаллы Gd3Ga5O12:Nd3+ для непрерывных лазеров (4F3/2→4I11/2 и 4F3/2→4I13/2 каналы) с диодно-лазерной накачкой [Текст] / А. А. Каминский [и др.] // Кристаллография. - 2002. - Т. 47 Вып. 2. - С. 344-348

Держатели документа:
Shubnikov Inst. of Crystallography, Russian Academy of Sciences, Leninskii pr. 59, Moscow 117333, Russian Federation

Доп.точки доступа:
Kaminskii, A. A.; Butashin, A. V.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Bezmaternykh, L. N.; Безматерных, Леонард Николаевич; Temerov, V. L.; Темеров, Владислав Леонидович; Kravtsov, N. V.; Firsov, V. V.; Seo, D. T.; Hommerich, U.; Temple, D.; Braud, A.
}
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19.

    Gallium composition-dependent structural phase transitions in HoFe3-xGax(BO3)4 solid solutions: crystal growth, structure, and Raman spectroscopy study / E. Moshkina, S. Krylova, I. Gudim [et al.] // Cryst. Growth Des. - 2020. - Vol. 20, Is. 2. - P. 1058-1069, DOI 10.1021/acs.cgd.9b01387. - Cited References: 30. - The reported study was funded by the Russian Foundation for Basic Research No. 18-02-00754. The experiments were performed using equipment of Center for Common Use, Krasnoyarsk Scientific Center, FSC SB RAS . - ISSN 1528-7483
   Перевод заглавия: Структурные фазовые переходы по концентрации галлия в твердых растворах HoFe3-xGax(BO3)4: рост кристаллов, структура и комбинационное рассеяние
Кл.слова (ненормированные):
Crystal growth -- Crystal structure -- Density functional theory -- Gallium -- Gallium compounds -- Iron compounds -- Raman scattering -- Solid solutions -- X ray powder diffraction
Аннотация: Single crystals of solid solutions of HoFe3–xGax(BO3)4 with x = 0, 0.5, 1, 1.5, and 3 were obtained using flux synthesis. The conditions of the synthesis are described in detail. The structural properties of each of the synthesized samples were studied using X-ray powder diffraction analysis at several temperature points (303, 403, and 503 K). The structural parameters of the obtained samples and the “pure” compounds HoFe3(BO3)4 and HoGa3(BO3)4 were compared. The Raman spectra of the obtained solid solutions HoFe3–xGax(BO3)4 were studied in a wide temperature range (T = 10–400 K). The vibrational spectra and eigenvectors of the HoFe3Ga(BO3)4 and HoGa3(BO3)4 in R32 phase and HoFe3Ga(BO3)4 in P3121 phase were calculated within density functional theory. The features of the Raman spectra of HoFe2Ga(BO3)4, HoFe2.5Ga0.5(BO3)4, HoFe3(BO3)4 crystals associated with the R32 → P3121 structural phase transition, which have a strong dependence on the degree of substitution x, were investigated. Peculiarities of the Raman spectra, which are associated with magnetic ordering in HoFe1.5Ga1.5(BO3)4, HoFe2Ga(BO3)4, and HoFe2.5Ga0.5(BO3)4 crystals, were detected.

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Держатели документа:
Kirensky Institute of Physics, FRC KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, 660014, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation

Доп.точки доступа:
Moshkina, E. M.; Мошкина, Евгения Михайловна; Krylova, S. N.; Крылова, Светлана Николаевна; Gudim, I. A.; Гудим, Ирина Анатольевна; Molokeev, M. S.; Молокеев, Максим Сергеевич; Temerov, V. L.; Темеров, Владислав Леонидович; Pavlovskiy, M. S.; Павловский, Максим Сергеевич; Vtyurin, A. N.; Втюрин, Александр Николаевич; Krylov, A. S.; Крылов, Александр Сергеевич
}
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20.

    Engineering of K3YSi2O7 to Tune Photoluminescence with Selected Activators and Site Occupancy / J. Qiao [et al.] // Chem. Mater. - 2019. - Vol. 31, Is. 18. - P. 7770-7778, DOI 10.1021/acs.chemmater.9b02990. - Cited References: 48. - This work was supported by the National Natural Science Foundation of China (Nos. 51722202, 51972118 and 51572023), Natural Science Foundations of Beijing (2172036), Fundamental Research Funds for the Central Universities (FRF-TP-18-002C1), and Guangdong Provincial Science & Technology Project (2018A050506004). This work was also supported by the National Science Foundation, Ceramics Program (No. 1911372), and the computational resources were provided by the Extreme Science and Engineering Discovery Environment (XSEDE) supported by the National Science Foundation (No. ACI-1548562). . - ISSN 0897-4756
   Перевод заглавия: Производство K3YSi2O7 для настройки фотолюминесценции с выбранными активаторами и заселением позиций
Кл.слова (ненормированные):
Citrus fruits -- Density functional theory -- Doping (additives) -- Energy gap -- Gallium alloys -- III-V semiconductors -- Indium alloys -- Light -- Light emitting diodes -- Metal ions -- Phosphors -- Photoluminescence -- Rare earths -- Rietveld refinement -- Semiconductor alloys
Аннотация: The luminescence of rare earth ions (Eu2+, Ce3+, and Eu3+)-doped inorganic solids is attractive for the screening of phosphors applied in solid-state lighting and displays and significant to probe the occupied crystallographic sites in the lattice also offering new routes to photoluminescence tuning. Here, we report on the discovery of the Eu- and Ce-activated K3YSi2O7 phosphors. K3YSi2O7:Eu is effectively excited by 450 nm InGaN blue light-emitting diodes (LEDs) and displays an orange-red emission originated from characteristic transitions of both Eu2+ and Eu3+, while K3YSi2O7:Ce3+ shows green emission upon 394 nm near-ultraviolet (NUV) light excitation. Rietveld refinement verifies the successful doping of the activators, and density functional theory (DFT) calculations further support that Eu2+ occupies both K1 and Y2 crystallographic sites, while Ce3+ and Eu3+ only occupy the Y2 site; hence, the broad-band red emission of Eu2+ are attributed to a small DFT band gap (3.69 eV) of K3YSi2O7 host and a selective occupancy of Eu2+ in a highly distorted K1 site and a high crystal field splitting around Y2 sites. The white LEDs device utilizing orange-red-emitting K3YSi2O7:Eu and green-emitting K3YSi2O7:Ce3+ exhibits an excellent CRI of 90.1 at a correlated color temperature of 4523 K. Our work aims at bridging multivalent Eu2+/Eu3+ and Ce3+ site occupancy in the same host to realize photoluminescence tuning and especially exposes new ways to explore new phosphors with multicolor emission pumped by blue and NUV light for white LEDs.

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Держатели документа:
School of Materials Sciences and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
Department of Nanoengineering, University of California, San Diego, 9500 Gilman Drive, San Diego, CA 92093, United States
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
National Synchrotron Radiation Research Center, Hsinchu, 300, Taiwan
State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, South China University of Technology, Guangzhou, 510641, China

Доп.точки доступа:
Qiao, J.; Amachraa, M.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Chuang, Y. -C.; Ong, S. P.; Zhang, Q.; Xia, Z.
}
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