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An analysis of the mechanism of Kerr effect enhancement in Mn/Dy/Bi / S. G. Ovchinnikov [et al.] // Phys. Solid State. - 1999. - Vol. 41, Is. 1. - P. 80-86, DOI 10.1134/1.1130733. - Cited References: 35 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
ELECTRONIC-STRUCTURE
   THIN-FILMS
   MAGNETIC-PROPERTIES
   RARE-EARTH
   MAGNETOOPTICAL PROPERTIES
   MNBI FILMS
   STABILITY
   GD
Аннотация: A study is reported of the structural, magnetic, and magneto-optic properties of Mn/Dy/Bi films obtained by multilayer technology. The maximum Kerr rotation angle in such films is shown to be theta(k) = 2.25 degrees. Possible reasons for such a large Kerr effect enhancement are considered, namely, an increase in the 6p - 3d transition probability caused by symmetry distortion, polarization of the Bi6p band, and a change in the density of states near the Fermi level. The latter reason has been analyzed by simulating the electronic structure of Mn/Dy/Bi through superposition of Dy levels on the MnBi band structure. This approach has revealed possible additional transitions which may be induced by the presence of a Dy buffer and could contribute to the Kerr magneto-optic effect. (C) 1999 American Institute of Physics. [S1063=7834(99)02001-8].

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Публикация на русском языке Анализ механизма увеличения эффекта Керра в Mn/Dy/Bi [Текст] / С. Г. Овчинников [и др.] // Физ. тверд. тела. - С.-Петербург, 1999. - Т. 41 Вып. 1. - С. 91-97

Держатели документа:
Russian Acad Sci, LV Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Burkova, L. V.; Буркова, Людмила Викторовна; Seredkin, V. A.; Середкин, Виталий Александрович; Yakovchuk, V. Y.
}
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Analysis of the electrical and optical properties of VBO3 single crystals and Fe1-xVxBO3 solid solutions on the basis of a many-electron model of energy band structure / N. B. Ivanova [et al.] // Phys. Solid State. - 2004. - Vol. 46, Is. 8. - P. 1462-1468, DOI 10.1134/1.1788779. - Cited References: 32. - One of the authors (M.M.A.) would like to thank the Deutsche Forschungsgemeinschaft (SFB608) for financial support. This study was supported by the Russian Foundation for Basic Research (project no. 03-02-16286), the program "Integration" (project no. B0017), and the program of the Division of Physical Sciences of the Russian Academy of Sciences "Strongly Correlated Electrons" . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
MAGNETIC-PROPERTIES
   CALCITE STRUCTURE
   PHASE-TRANSITION
   FERRIC BORATE
   HIGH-PRESSURE
   FEBO3
   FE1-XCRXBO3
   FERROMAGNET
   MOSSBAUER
   SPECTRA
Аннотация: A many-electron model of the energy band structure of VBO3 and of Fe1 - xVxBO3 solid solutions is proposed with strong electron correlations taken into account. Experimental optical absorption spectra and data on the resistivity are discussed in the framework of the suggested model. Variation in the magnetic and electronic properties of VBO3 and Fe1 - xVxBO3 under high pressure is predicted. For VBO3, a Mott-Hubbard (insulator-metal) transition is expected in the high-pressure phase. In Fe1 - xVxBO3 solid solutions, a nontrivial variation in the properties is predicted, leading to the appearance of a different magnetic state. (C) 2004 MAIK "Nauka / Interperiodica".

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Публикация на русском языке Анализ электрических и оптических свойств монокристаллов VBO[3] и твердых растворов Fe[1-x]V[x]BO[3] на основе многоэлектронной модели из зонной структуры [Текст] / Н. Б. Иванова [и др.] // Физ. тверд. тела. - 2004. - Т. 46 Вып. 8. - С. 1422-1427

Держатели документа:
Krasnoyarsk State Tech Univ, Krasnoyarsk 660074, Russia
Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany
ИФ СО РАН
Krasnoyarsk State Tech. University, Krasnoyarsk, 660074, Russian Federation
II. Physikalisches Institut, Universitat zu Koln, Koln, 50937, Germany

Доп.точки доступа:
Ivanova, N. B.; Иванова, Наталья Борисовна; Kazak, N. V.; Казак, Наталья Валерьевна; Markov, V. V.; Марков, Владимир Витальевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Rudenko, V. V.; Руденко, Валерий Васильевич; Abd-Elmeguid, M. M.
}
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Bi2(Sn0.95Cr0.05)2O7: Structure, IR spectra, and dielectric properties / S. S. Aplesnin [et al.] // Ceram. Int. - 2016. - Vol. 42, Is. 4. - P. 5177-5183, DOI 10.1016/j.ceramint.2015.12.040. - Cited References: 45. - This work was supported by the Russian Foundation for Basic Research Projects no. 15-42-04099 r_siberia_a, Siberian Branch of Science and NAS of Belarus “Electronic and magnetic phase transitions in materials with magnetoelectric affect” and government work no. 114090470016. . - ISSN 0272-8842

РУБ Materials Science, Ceramics
Рубрики:
BISMUTH PYROSTANNATE
   PYROCHLORE STRUCTURE
   MAGNETIC-PROPERTIES
   PARTIAL OXIDATION
   HIGH-TEMPERATURE
   X-RAY
   Bi2Sn2O7
   SUBSTITUTION
   CATALYSTS
   DIFFRACTION
Кл.слова (ненормированные):
Bismuth pyrostannate -- Infrared absorption spectra -- Structural transition -- Permittivity -- Debye model
Аннотация: Infrared absorption spectra of the bismuth pyrostannate Bi2(Sn0.95Cr0.05)2O7 were investigated in the frequency range 350-1100 cm-1 at temperatures of 110-525 K. Four frequency regions with split absorption lines are distinguished. Softening of frequencies at the structural transitions was observed. The maxima of permittivity measured in the frequency range 1-200 kHz at temperatures 100-400 K were determined. It was found that the magnetic susceptibility changes its sign in the low-temperature region. The correlation between anomalies in the magnetic susceptibility, permittivity, and absorption line intensity was established. Softening of frequencies is explained by the variation in the coefficient of thermal expansion of the lattice. The temperature behavior of permittivity is described using the Debye model. © 2015 Elsevier Ltd and Techna Group S.r.l.

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Держатели документа:
Kirensky Institute of Physics, Russian Academy of Sciences, Siberian Branch, Akademgorodok 50, Krasnoyarsk, Russian Federation
Siberian State Aerospace University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Udod, L. V.; Удод, Любовь Викторовна; Sitnikov, M. N.; Shestakov, N. P.; Шестаков, Николай Петрович
}
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Biogenic ferrihydrite nanoparticles produced by Klebsiella oxytoca: Characterization, physicochemical properties and bovine serum albumin interactions / N. Cazacu, C. G. Chilom, S. Iftimie [et al.] // Nanomaterials. - 2022. - Vol. 12, Is. 2. - Ст. 249, DOI 10.3390/nano12020249. - Cited References: 59. - This research was funded by JINR Themes 02-1-1107-2011/2021, 04-5-1131-2017/2021 and 04-4-1133-2018/2023 and with the financial support of the RO-JINR Projects Nos. 366/11.05.2021 (items 7, 86, 97) and 365/11.05.2021 (items 8, 87 and 98). This work also benefited from the use of the SasView application, originally developed under NSF Award DMR-0520547. SasView also contains the code developed with funding from the EU Horizon 2020 program under the SINE2020 project Grant No 654000. The APC was funded by JINR Theme 02-1-1107-2011/2021, Project No. 366/11.05.2021, item 7. This study used the infrastructure of the Applied Genetics Resource Facility of MIPT (Suport Grant 075-15-2021-684) . - ISSN 2079-4991

РУБ Chemistry, Multidisciplinary + Nanoscience & Nanotechnology + Materials Science, Multidisciplinary + Physics, Applied
Рубрики:
MAGNETIC-PROPERTIES
   REDUCTION
   MOSSBAUER
   FERRITIN
   DOCKING
   BINDING
Кл.слова (ненормированные):
biogenic ferrihydrite nanoparticles -- the binding mechanism -- energy transfer -- protein stability -- molecular docking
Аннотация: The synthesis of nanoparticles inside microorganisms is an economical alternative to chemical and physical methods of nanoparticle synthesis. In this study, ferrihydrite nanoparticles synthesized by Klebsiella oxytoca bacterium in special conditions were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDS), small-angle X-ray (SAXS), UV-Vis spectroscopy, fluorescence, fluorescence resonance energy transfer (FRET), and molecular docking. The morphology and the structure of the particles were characterized by means of SEM and SAXS. The elemental content was determined by means of the EDS method. The absorption properties of the ferrihydrite nanoparticles were investigated by UV-Vis spectroscopy. The binding mechanism of the biogenic ferrihydrite nanoparticles to Bovine Serum Albumin (BSA) protein, studied by fluorescence, showed a static and weak process, combined with FRET. Protein denaturation by temperature and urea in the presence of the ferrihydrite nanoparticles demonstrated their influence on the unfolding process. The AutoDock Vina and UCSF Chimera programs were used to predict the optimal binding site of the ferrihydrite to BSA and to find the location of the hydrophobic cavities in the sub-domain IIA of the BSA structure.

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Держатели документа:
Univ Bucharest, Fac Phys, Dept Elect Solid State & Biophys, RO-077125 Magurele, Romania.
Horia Hulubei Natl Inst Phys & Nucl Engn, Dept Nucl Phys, RO-077125 Magurele, Romania.
Joint Inst Nucl Res, Dubna 141980, Russia.
Moscow Inst Phys & Technol, Dolgoprudnyi 141701, Russia.
Russian Acad Sci, Siberian Branch, Fed Res Ctr KSC, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Sch Engn Phys & Radio Elect, Phys Dept, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Cazacu, Nicoleta; Chilom, Claudia G.; Iftimie, Sorina; Balasoiu, Maria; Ladygina, Valentina P.; Stolyar, S. V.; Столяр, Сергей Викторович; Orelovich, Oleg L.; Kovalev, Yuriy S.; Rogachev, Andrey V.
}
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    Catalytic properties and nature of active centers of ferrospheres in oxidative coupling of methane / A. G. Anshits [et al.] // Appl. Catal. A-Gen. - 2016. - Vol. 524. - P. 192-199, DOI 10.1016/j.apcata.2016.06.032. - Cited References:47. - This study was supported by the Russian Science Foundation (project no. 14-13-00289). . - ISSN 0926-860X. - ISSN 1873-3875
   Перевод заглавия: Каталитические свойства и природа активных центров ферросфер в оксидативной связи метана

РУБ Chemistry, Physical + Environmental Sciences
Рубрики:
GLASS CRYSTAL CATALYSTS
   MAGNETIC-PROPERTIES
   PROFILE REFINEMENT
   FLY-ASH
   MOSSBAUER
   MICROSPHERES
   PERFORMANCE
   CONVERSION
   ETHYLENE
   OXIDE
Кл.слова (ненормированные):
Methane coupling -- Active center -- Ferrospinel -- Mossbauer spectroscopy
Аннотация: Ferrospheres with the Fe2O3 content in the range from 76 to 97 wt% were applied as catalysts for the oxidative coupling of methane (OCM). To identify their phase composition and distribution of iron sites, the ferrospheres were characterized by X-ray powder diffraction and Mossbauer spectroscopy before and after the OCM reaction. Magnetite-based ferrite spinel, hematite and aluminosilicate glasses were established to be the main phases. The ferrospinel of all ferrospheres partially oxidized to hematite after the OCM reaction. It was established that the yield of C-2-hydrocarbons sharply increased at the ferrospheres with Fe2O3 content higher than 89 wt% The spinel phase of these ferrospheres includes Fevv3+(B) sites with a Ca2+ tetrahedral cation and an octahedral cation vacancy among the nearest neighbors. A linear correlation between the yield of C-2-hydrocarbons (ethane and ethylene) and the content of such sites was established, thus indicating that their electrophilic oxygen species participate in selective CH4 conversion to C2H6. (C) 2016 Elsevier B.V. All rights reserved.

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Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Akad Gorodok 50-24, Krasnoyarsk 660036, Russia.
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Akad Gorodok 50-38, Krasnoyarsk 660036, Russia.
Univ Rostock, Leibniz Inst Katalyse eV, Albert Einstein Str 29 a, D-18059 Rostock, Germany.

Доп.точки доступа:
Anshits, A. G.; Bayukov, O. A.; Баюков, Олег Артемьевич; Kondratenko, E. V.; Anshits, N. N.; Pletnev, O. N.; Плетнев, Олег Николаевич; Rabchevskii, E. V.; Solovyov, L. A.; Russian Science Foundation [14-13-00289]
}
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Cobalt ferrite nanoparticles in a mesoporous silicon dioxide matrix / S. V. Komogortsev [et al.] // Tech. Phys. Lett. - 2009. - Vol. 35, Is. 10. - P. 882-884, DOI 10.1134/S1063785009100022. - Cited References: 10. - This study was supported in part by the Federal Program "Development of the Scientific Potential of Higher Education" (project no. RNP. 2.1.1/2584) and jointly by the Krasnoyarsk Regional Science Foundation and the Russian Foundation for Basic Research (project nos. r-Enisei-a 03-07-96803 and 09-02-98002-r_sibir'_a). . - ISSN 1063-7850

РУБ Physics, Applied
Рубрики:
MAGNETIC-PROPERTIES
   NANOSIZED COFE2O4
   ANISOTROPY
   POWDERS
   CURVES
Аннотация: We have studied magnetic nanoparticles of cobalt ferrite obtained by the extraction-pyrolysis method in a mesoporous silicon dioxide (MSM-41) molecular sieve matrix. The X-ray diffraction data show evidence for the formation of CoFe(2)O(4) particles with a coherent scattering domain size of similar to 40 nm. Measurements of the magnetization curves showed that powders consisting of these nanoparticles are magnetically hard materials with a coercive field of H (c)(4.2 K) = 9.0 kOe and H (c)(300 K) = 1.8 kOe and a reduced remanent magnetization of M (r)/M (s)(4.2 K) = 0.83 and M (r)/M (s)(300 K) = 0.49. The shape of the low-temperature (4.2 K) magnetization curves is adequately described in terms of the Stoner-Wohlfarth model for randomly oriented single-domain particles with a cubic magnetic anisotropy.

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Держатели документа:
[Komogortsev, S. V.] Russian Acad Sci, Siberian Branch, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia
Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Krasnoyarsk 660036, Russia
Siberian State Technol Univ, Krasnoyarsk 660049, Russia
ИФ СО РАН
ИХХТ СО РАН
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk 660041, Russian Federation
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian State Technological University, Krasnoyarsk 660049, Russian Federation

Доп.точки доступа:
Komogortsev, S. V.; Комогорцев, Сергей Викторович; Patrusheva, T. N.; Патрушева, Тамара Николаевна; Balaev, D. A.; Балаев, Дмитрий Александрович; Denisova, E. A.; Денисова, Елена Александровна; Ponomarenko, I. V.; Development of the Scientific Potential of Higher Education [RNP. 2.1.1/2584]; Krasnoyarsk Regional Science Foundation; Russian Foundation for Basic Research [r-Enisei-a 03-07-96803, 09-02-98002-r_sibir'_a]
}
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    Aleksandrov, K. S.
    Crystal chemistry and prediction of compounds with a structure of skutterudite type / K. S. Aleksandrov, B. V. Beznosikov // Crystallogr. Rep. - 2007. - Vol. 52, Is. 1. - P. 28-36, DOI 10.1134/S106377450701004X. - Cited References: 47 . - ISSN 1063-7745
Рубрики:
SUPERCONDUCTOR PROS4SB12
   MAGNETIC-PROPERTIES
   HIGH-PRESSURE
   RARE-EARTH
   TRANSITION
   LAFE4P12
Аннотация: Crystallochemical analysis of skutterudite-type structures in the BX3, AB(4)X(12), and A B-3' B4O12 compositions (A and B are metals; X = P, As, Sb) has been performed. Probable regions of structure formation are determined, thereby indicating that more than 270 new compounds of the AB4X12 composition can be synthesized.(1)

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Публикация на русском языке Александров, Кирилл Сергеевич. Кристаллохимия и прогноз соединений со структурой типа скуттерудита [Текст] / К. С. Александров, Б. В. Безносиков // Кристаллография. - 2007. - Т. 52 Вып. 1. - С. 32-40

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Beznosikov, B. V.; Безносиков, Борис Валерьевич; Александров, Кирилл Сергеевич
}
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Crystal structures of EuLnCuS3 (Ln = Nd and Sm) / A. V. Ruseikina [et al.] // Russ. J. Inorg. Chem. - 2012. - Vol. 57, Is. 1. - P. 79-83, DOI 10.1134/S0036023612010172. - This work was supported by the Federal Target Program "Scientific and Pedagogical Personnel of Innovative Russia" for 2009-2013 (grant nos. 6K/143-09 (P 646) and NK-409/5 (P2263)) and the President of the Russian Federation (Support Program for Leading Scientific Schools of the Russian Federation, grant NSh-4645.2010.2). - The results of this study have been presented at the X International Scientific Conference “Solid-State Chemistry: Nanomaterials, Nanotechnologies” (Stavropol, October 17–22, 2010) and the All-Russia Scientific Conference “Challenges of Modern Chemistry. Theory and Practice” (Ufa, October 21–23, 2010). . - ISSN 0036-0236

РУБ Chemistry, Inorganic & Nuclear
Рубрики:
RARE-EARTH
   MAGNETIC-PROPERTIES
   COPPER SULFIDE
   CHALCOGENIDES
   EUROPIUM
   EU2CUS3
Аннотация: The compound sulfides EuLnCuS3 (Ln = Nd and Sm) were obtained for the first time. Their crystal structures were determined from X-ray powder diffraction data. The crystals of both compounds are orthorhombic (space group Pnma). The compound EuNdCuS3 is isostructural with BaLaCuS3; the unit cell parameters are a = 11.0438(2) Å, b = 4.0660(1) Å, c = 11.4149(4) Å. The compound EuSmCuS3 is isostructural with Eu2CuS3; the unit cell parameters are a = 10.4202(2) Å, b = 3.9701(1) Å, c = 12.8022(2) Å.

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Публикация на русском языке Кристаллическая структура соединений EuLnCuS3 (Ln = Nd, Sm) [Текст] / А. В. Русейкина [и др.] // Журн. неорг. химии : Наука, 2012. - Т. 57 № 1. - С. 86-90

Держатели документа:
GOU VPO Tyumen State Univ, Tyumen, Russia
Russian Acad Sci, Siberian Branch, Inst Chem & Chem Technol, Krasnoyarsk, Russia
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk, Russia

Доп.точки доступа:
Ruseikina, A. V.; Solovyov, L. A.; Соловьев, Леонид Александрович; Molokeev, M. S.; Молокеев, Максим Сергеевич; Andreev, O. V.
}
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Physics, Applied
C94

Cuprates, manganites and cobaltites: Multielectron approach to the band structure / M. M. Korshunov [et al.] // Mod. Phys. Lett. B. - 2012. - Vol. 26, Is. 24. - Ст. 1230016, DOI 10.1142/S0217984912300165. - Cited References: 93. - We are thankful to O. K. Andersen, V. I. Anisimov, A. F. Barabanov, K. I. Kikoin, N. M. Plakida, S. Sakai, A.-M.S. Tremblay, V. V. Val'kov, and R. O. Zaitsev for useful discussions. This work was supported by the Presisium of RAS program Quantum physics of condensed matter N 20.7, Grant "Leading scientific schools of Russia" (NSh 1044-2012.2), RFBR (Grant No. 09-02-00127), Integration Grant of SBRAS-UrBRAS N 44, Grant of President of Russia MK-1683.2010.2, FCP Scientific and Research-and-Educational Personnel of Innovative Russia for 2009-2013 (GK 16.740.12.0731 and GK 16.740.11.0740), and Siberian Federal University (Theme N F-11). M.M.K. and E.I.S. acknowledges support from The Dynasty Foundation and ICFPM. . - ISSN 0217-9849

РУБ Physics, Applied + Physics, Condensed Matter + Physics, Mathematical
Рубрики:
HIGH-TEMPERATURE SUPERCONDUCTORS
   MEAN-FIELD THEORY
   DENSITY-FUNCTIONAL FORMALISM
   CORRELATED ELECTRON-SYSTEMS
   TRANSITION-METAL COMPOUNDS
   SPIN-STATE TRANSITION
   T-J MODEL
   MAGNETIC-PROPERTIES
   COPPER OXIDES
   LaCoO3
Кл.слова (ненормированные):
LDA plus GTB method -- strongly-correlated systems -- band structure
Аннотация: High-T-c superconductors with CuO2 layers, manganites La1-xSrxMnO3 and cobaltites LaCoO3 present several mysteries in their physical properties. Most of them are believed to come from the strongly-correlated nature of these materials. From the theoretical viewpoint, there are many hidden rocks in making the consistent description of the band structure and low-energy physics starting from the Fermi-liquid approach. Here, we discuss the alternative method - multielectron approach to the electronic structure calculations for the Mott insulators - called LDA + GTB (local density approximation + generalized tight-binding) method. Its origin is a straightforward generalization of the Hubbard perturbation theory in the atomic limit and the multiband p - d Hamiltonian with the parameters calculated within LDA. We briefly discuss the method and focus on its applications to cuprates, manganites and cobaltites.

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Держатели документа:
[Korshunov, M. M.
Ovchinnikov, S. G.
Shneyder, E. I.
Gavrichkov, V. A.
Orlov, Yu. S.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Korshunov, M. M.
Ovchinnikov, S. G.
Gavrichkov, V. A.
Orlov, Yu. S.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Shneyder, E. I.] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
[Nekrasov, I. A.] Russian Acad Sci, Inst Electrophys, Ekaterinburg 620016, Russia
[Pchelkina, Z. V.] Russian Acad Sci, Inst Met Phys, Ekaterinburg 620219, Russia
L. V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Svobodny Prospect 79, Krasnoyarsk 660041, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk 660014, Russian Federation
Institute for Electrophysics, Russian Academy of Sciences, Ekaterinburg 620016, Russian Federation
Institute for Metal Physics, Russian Academy of Sciences, Ekaterinburg 620219, Russian Federation

Доп.точки доступа:
Korshunov, M. M.; Коршунов, Максим Михайлович; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Shneyder, E. I.; Шнейдер, Елена Игоревна; Gavrichkov, V. A.; Гавричков, Владимир Александрович; Orlov, Yu.S.; Орлов, Юрий Сергеевич; Nekrasov, I. A.; Pchelkina, Z. V.
}
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10.

Dynamic remagnetisation of CoFe2O4 nanoparticles: thermal fluctuational thawing of anisotropy / D. A. Balaev, I. S. Poperechny, A. A. Krasikov [et al.] // J. Phys. D. - 2021. - Vol. 54, Is. 27. - Ст. 275003, DOI 10.1088/1361-6463/abf371. - Cited References: 63. - Experimental measurements were supported by Project No. AAAA-A17-117103050081-1. I S P and Yu L R acknowledge the support of ICMM in the framework of topical task AAAAA20-120020690030-5. The numerical calculations were performed on the Uran supercomputer (Ural Branch, Russian Academy of Sciences, Ekaterinburg) . - ISSN 0022-3727. - ISSN 1361-6463

РУБ Physics, Applied
Рубрики:
COBALT-FERRITE NANOPARTICLES
   MAGNETIC-PROPERTIES
   SIZE
   COERCIVITY
Кл.слова (ненормированные):
nanoparticles -- cobalt ferrite -- magnetodynamics -- superparamagnetism -- effective anisotropy
Аннотация: We report a study of the magnetodynamics of cobalt ferrite (CoFe2O4) nanoparticles with an average diameter of ~6 nm. Hysteresis loops were measured under quasi-static conditions and in pulse fields with amplitudes H0 of up to 130 kOe and for durations τP of 8 and 16 ms. The growth of coercivity Hc observed with an increase in the magnetic field variation rate dH/dt (determined by the values of H0 and τP) and the reduction of Hc with temperature is ascribed to the superparamagnetic effect. The proposed theoretical model explains the observed dependences fairly well. Notably, the effective magnetic anisotropy constant obtained exceeds the value for bulk crystals and might be indicative of the contribution of surface magnetic anisotropy.

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Держатели документа:
Russian Acad Sci, Inst Phys, Siberian Branch, Krasnoyarsk 660000, Russia.
Russian Acad Sci, Inst Continuous Media Mech, Ural Branch, Perm 614068, Russia.
Perm State Natl Res Univ, Dept Phase Transit Phys, Perm 614990, Russia.
Russian Acad Sci, Boreskov Inst Catalysis, Siberian Branch, Novosibirsk 630090, Russia.

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Poperechny, I. S.; Krasikov, A. A.; Красиков, Александр Александрович; Semenov, S. V.; Семёнов, Сергей Васильевич; Popkov, S. I.; Попков, Сергей Иванович; Knyazev, Yu. V.; Князев, Юрий Владимирович; Kirillov, V. L.; Yakushkin, S. S.; Martyanov, O. N.; Raikher, Y. L.; [AAAA-A17-117103050081-1]; [AAAAA20-120020690030-5]
}
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11.

Romanova, O. B.
Effect of electron and hole doping on the transport characteristics of chalcogenide systems / O. B. Romanova, S. S. Aplesnin, L. V. Udod // Phys. Solid State. - 2021. - Vol. 63, Is. 5. - P. 754-757, DOI 10.1134/S1063783421050152. - Cited References: 21. - This study was supported by the Russian Foundation for Basic Research and the Belarusian Republican Foundation for Basic Research, project no. 20-52-00005 . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
MAGNETIC-PROPERTIES
TRANSITION
Кл.слова (ненормированные):
semiconductors -- conductivity -- Hall constant -- mobility
Аннотация: The electrical properties of the Ag0.01Mn0.99S and Tm0.01Mn0.99S semiconductor compounds and the Hall effect in them have been investigated in the temperature range of 80-400 K in a magnetic field of 12 kOe. Using the I-V characteristics, the conductivity mechanism depending on the doping type and concentration has been established. Upon substitution of silver for manganese, the Mott-type conductivity has been found, while substitution of thulium causes the ohmic conductivity. The mobility and type of carriers have been determined from the Hall constant data.

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Публикация на русском языке Романова, Оксана Борисовна. Влияние электронного и дырочного допирования на транспортные характеристики халькогенидных систем [Текст] / О. Б. Романова, С. С. Аплеснин, Л. В. Удод // Физ. тверд. тела. - 2021. - Т. 63 Вып. 5. - С. 606-609

Держатели документа:
Russian Acad Sci, Krasnoyarsk Sci Ctr, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk 660036, Russia.
Siberian State Univ Sci & Technol, Krasnoyarsk 660014, Russia.

Доп.точки доступа:
Aplesnin, S. S.; Аплеснин, Сергей Степанович; Udod, L. V.; Удод, Любовь Викторовна; Романова, Оксана Борисовна; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Belarusian Republican Foundation for Basic Research [20-52-00005]
}
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12.

Electron transition in intercalated disulfide CuCrS2 / G. M. Abramova [et al.] // Phys. Solid State. - 2004. - Vol. 46, Is. 12. - P. 2225-2228, DOI 10.1134/1.1841385. - Cited References: 12 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
METAL DICHALCOGENIDES
MAGNETIC-PROPERTIES
Аннотация: Electrical, resonant, and magnetic properties of intercalated copper chromium disulfide CuCrS2 are studied. It is established that CuCrS2 is an antiferromagnetic semiconductor with Neel temperature T-N = 40.7 K and an effective magnetic moment of 4.3mu(B). Anomalies in the electrical, magnetic, and resonant properties of CuCrS2 are found at T-c = 110 K, which suggest an electron transition accompanied by alteration of the valences of the 3d-metal ions. (C) 2004 MAIK "Nauka/Interperiodica".

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Держатели документа:
Krasnoyarsk State Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Bashkortostan State Univ, Ufa 450074, Bashkortostan, Russia
ИФ СО РАН
Krasnoyarsk State University, pr. Svobodnyi 79, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Akademgorodok, 660036, Russian Federation
Bashkortostan State University, ul. Frunze 32, Ufa, Bashkortostan, 450074, Russian Federation

Доп.точки доступа:
Abramova, G. M.; Абрамова, Галина Михайловна; Vorotynov, A. M.; Воротынов, Александр Михайлович; Petrakovskii, G. A.; Петраковский, Герман Антонович; Kiselev, N. I.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Bovina, A. F.; Бовина, Ася Федоровна; Al'mukhametov, R. F.; Yakshibaev, R. A.; Gabitov, E. V.
}
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13.

    Electronic structure of β-RbSm(MoO4)2 and chemical bonding in molybdates / V. V. Atuchin [et al.] // Dalton Trans. - 2015. - Vol. 44, Is. 4. - P. 1805-1815, DOI 10.1039/c4dt03203a. - Cited References: 121. - VVA and ASA gratefully acknowledge the Ministry of Education and Science of the Russian Federation for financial support. ZL acknowledges the support by National Natural Science Foundation of China (11174297 and 11474292), the National Basic Research Project of China (2011CB922204), and Foundation of the Director of Technical Institute of Physics and Chemistry, CAS. The work was partially supported by RAS Project 24-29 and RFBR Grant 13-02-00825. . - ISSN 1477-9226. - ISSN 1477-9234
   Перевод заглавия: Электронная структура бета-RbSm(MoO4)2 и химическая связь в молибдатах

РУБ Chemistry, Inorganic & Nuclear
Рубрики:
RAY PHOTOELECTRON-SPECTROSCOPY
   CRYSTAL-STRUCTURE
   X-RAY
   NEUTRON-DIFFRACTION
   MAGNETIC-PROPERTIES
   PHASE-FORMATION
   CORE LEVELS
   2ND-HARMONIC GENERATION
   LUMINESCENCE PROPERTIES
   VIBRATIONAL PROPERTIES
Аннотация: Microcrystals of orthorhombic rubidium samarium molybdate, beta-RbSm(MoO4)(2), have been fabricated by solid state synthesis at T = 450 degrees C, 70 h, and at T = 600 degrees C, 150 h. The crystal structure has been refined by the Rietveld method in space group Pbcn with cell parameters a = 5.0984(2), b = 18.9742(6) and c = 8.0449(3) angstrom (R-B = 1.72%). Thermal properties of beta-RbSm(MoO4)(2) were traced by DSC over the temperature range of T = 20-965 degrees C, and the earlier reported β ↔ α phase transition at T similar to 860-910 degrees C was not verified. The electronic structure of beta-RbSm(MoO4) 2 was studied by employing theoretical calculations and X-ray photoelectron spectroscopy. It has been established that the O 2p-like states contribute mainly to the upper part of the valence band and occupy the valence band maximum, whereas the Mo 4d-like states contribute mainly to the lower part of the valence band. Chemical bonding effects have been analysed from the element core level binding energy data. In addition, it was found that the luminescence spectrum of beta-RbSm(MoO4)(2) is rather peculiar among the Sm3+ containing materials. The optical refractive index dispersion in beta-RbSm(MoO4)(2) was also predicted by the first-principles calculations.

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Держатели документа:
RAS, Inst Semicond 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
RAS, Kirensky Inst Phys, Lab Coherent Opt, SB, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
RAS, Baikal Inst Nat Management, Lab Oxide Syst, SB, Ulan Ude 670047, Russia
Gen Res Inst Nonferrous Met, Beijing 100088, Peoples R China
RAS, Inst Semicond Phys, Lab Nanodiagnost & Nanolithog, SB, Novosibirsk 630090 90, Russia
RAS, Inst Semicond Phys, Lab Phys Bases Integrated Microelect, SB, Novosibirsk 630090 90, Russia
RAS, Kirensky Inst Phys, Lab Crystal Phys, SB, Krasnoyarsk 660036, Russia
RAS, Kirensky Inst Phys, Lab Mol Spect, SB, Krasnoyarsk 660036, Russia
Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100190, Peoples R China

Доп.точки доступа:
Atuchin, V. V.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Chimitova, O. D.; Diao, C. P.; Gavrilova, T. A.; Kesler, V. G.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Krylov, A. S.; Крылов, Александр Сергеевич; Bazarov, B. G.; Bazarova, J. G.; Lin, Z. S.; Ministry of Education and Science of the Russian Federation; National Natural Science Foundation of China [11174297, 11474292]; National Basic Research Project of China [2011CB922204]; Foundation of the Director of Technical Institute of Physics and Chemistry, CAS; RAS [24-29]; RFBR [13-02-00825]
}
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14.

EPR study of the Jahn-Teller effect of Cu2+ ions in ZnGa2O4 / A. M. Vorotynov [et al.] // Phys. Solid State. - 2010. - Vol. 52, Is. 11. - P. 2415-2418, DOI 10.1134/S1063783410110314. - Cited References: 12 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
MAGNETIC-PROPERTIES
PARTICLES
CUFE2O4
Аннотация: The Jahn-Teller effect in the ZnGa2O4 spinel single crystal has been investigated using electron paramagnetic resonance of Cu2+ ions in the temperature range 110-560 K. It has been shown that copper ions occupy octahedral sites 16d in the ZnGa2O4 crystal with cubic symmetry O (h) (7) (Fd-3m). At T 560 K, the octahedra undergo tetragonal distortions (predominantly tension) and rotation around the fourfold axes by the angle theta a parts per thousand 2.6A degrees. The parameters of the spin Hamiltonian, which characterize the prolate (g (aEuro-)

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Держатели документа:
[Vorotynov, A. M.
Petrakovskii, G. A.
Sablina, K. A.
Bovina, A. F.
Vasil'ev, A. D.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Vorotynov, A. M.; Воротынов, Александр Михайлович; Petrakovskii, G. A.; Петраковский, Герман Антонович; Sablina, K. A.; Саблина, Клара Александровна; Bovina, A. F.; Бовина, Ася Федоровна; Vasil'ev, A. D.; Васильев, Александр Дмитриевич
}
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15.

External electric field effect on electronic properties and charge transfer in CoI2/NiI2 spinterface / I. Melchakova [et al.] // Int. J. Quantum Chem. - 2020. - Vol. 120, Is. 3. - Ст. e26092, DOI 10.1002/qua.26092. - Cited References: 27. - Ministry of Education and Science of the Russian Federation, Grant/Award Number: 16.1455.2017/PCh; National Research Foundation of Korea, Grant/Award Number: NRF-2017R1A2B4004440; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science, Grant/Award Number: 18-43-243011 . - ISSN 0020-7608. - ISSN 1097-461X

РУБ Chemistry, Physical + Mathematics, Interdisciplinary Applications + Quantum Science & Technology + Physics, Atomic, Molecular & Chemical
Рубрики:
MAGNETIC-PROPERTIES
METAL
EDGE
Кл.слова (ненормированные):
DFT -- electric field -- Hubbard correction -- spintronics -- transition metal dihalides
Аннотация: Electronic structure and spin-related properties of CoI2/NiI2 heterostructure were studied by means of density functional theory. It was shown that the electronic structure at the Fermi level can be characterized by a band gap. The effect of the external electric field on charge transfer and electronic properties of the CoI2/NiI2 interface was investigated, and it was found that band gap width depends on the strength of the applied electric field, switching its nature from semiconducting to a half-metallic one. An easy control of the electronic properties and promising spin-polarized nature of the CoI2/NiI2 spinterface allows the heterostructure to be used in spin-related applications.

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Держатели документа:
Siberian Fed Univ, Krasnoyarsk, Russia.
Kirensky Inst Phys, Krasnoyarsk, Russia.
Kyungpook Natl Univ, Dept Chem, 80 Daehak Ro, Daegu 41566, South Korea.

Доп.точки доступа:
Melchakova, I.; Мельчакова, Юлия; Kovaleva, E. A.; Ковалева, Евгения Андреевна; Mikhaleva, Natalia S.; Tomilin, F. N.; Томилин, Феликс Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Kuzubov, A. A.; Кузубов, Александр Александрович; Avramov, P. V.; Аврамов, Павел Вениаминович; Ministry of Education and Science of the Russian FederationMinistry of Education and Science, Russian Federation [16.1455.2017/PCh]; National Research Foundation of KoreaNational Research Foundation of Korea [NRF-2017R1A2B4004440]; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Regional Fund of Science [18-43-243011]
}
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16.

Fe nanowires in carbon nanotubes as an example of a one-dimensional system of exchange-coupled ferromagnetic nanoparticles / R. S. Iskhakov [et al.] // JETP Letters. - 2003. - Vol. 78, Is. 4. - P. 236-240, DOI 10.1134/1.1622038. - Cited References: 38 . - ISSN 0021-3640

РУБ Physics, Multidisciplinary
Рубрики:
MAGNETIC-PROPERTIES
   RANDOM ANISOTROPY
   ELECTRODEPOSITED NANOWIRES
   NI NANOWIRES
   ARRAYS
   NANOCRYSTALLINE
   ALUMINA
   NICKEL
   PORES
   STATE
Аннотация: The cooperative phenomena revealed in the field and temperature dependences of the magnetization in a system of iron nanoparticles in carbon nanotubes were studied experimentally. The character of the temperature dependences of the magnetization indicates that the ferromagnetic Fe particles in carbon nanotubes are exchange-coupled. In the region where the magnetization approaches saturation, the magnetization curves reveal the power dependence DeltaM similar to H-3/2 typical for a one-dimensional system of exchange-coupled ferromagnetic nanoparticles. (C) 2003 MAIK "Nauka / Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Russian Acad Sci, Nikolaev Inst Inorgan Chem, Siberian Div, Novosibirsk 630090, Russia
Russian Acad Sci, Boreskov Inst Catalysis, Siberian Div, Novosibirsk 630090, Russia
ИФ СО РАН
Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Akademgorodok, 660036, Russian Federation
Nikolaev Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent'eva 3, Novosibirsk, 630090, Russian Federation
Boreskov Institute of Catalysis, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent'eva 5, Novosibirsk, 630090, Russian Federation

Доп.точки доступа:
Iskhakov, R. S.; Исхаков, Рауф Садыкович; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Balaev, A. D.; Балаев, Александр Дмитриевич; Okotrub, A. V.; Kudashov, A. G.; Kuznetsov, V. L.; Butenko, Y. V.
}
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17.

    Ferromagnetic resonance study of biogenic ferrihydrite nanoparticles: spin-glass state of surface spins / S. V. Stolyar, D. A. Balaev, V. P. Ladygina [et al.] // JETP Letters. - 2020. - Vol. 111, Is. 3. - P. 183-187, DOI 10.1134/S0021364020030145. - Cited References: 41. - This work was supported by the Russian Foundation for Basic Research, project no. 18-02-40137.This work was supported by the Russian Foundation for Basic Research, by the Government of Krasnoyarsk krai, by the Krasnoyarsk Regional Fund for the Support of Scientific and Technical Activities (project no. 19-42-240012 r_a “Magnetic Resonance in Ferrihydrite Nanoparticles: Effects Associated with the Core-Shell Structure”), and by the Council of the President of the Russian Federation for State Support of Young Scientists and Leading Scientific Schools (project no. MK-1263.2020.3). . - ISSN 0021-3640. - ISSN 1090-6487
Рубрики:
MAGNETIC-PROPERTIES
   NIO NANOPARTICLES
   TRANSITION
   ANISOTROPY
Аннотация: Ferrihydrite nanoparticles (2–3 nm in size), which are products of the vital activity of microorganisms, are studied by the ferromagnetic resonance method. The “core” of ferrihydrite particles is ordered antiferromagnetically, and the presence of defects leads to the appearance of an uncompensated magnetic moment in nanoparticles and the characteristic superparamagnetic behavior. It is established from the ferromagnetic resonance data that the field dependence of the frequency is described by the expression 2πν/γ = HR + H A(T=0) (1 − T/T*), where γ is the gyromagnetic ratio, HR is the resonance field, HA ≈ 7 kOe, and T* ≈ 50 K. The induced anisotropy HA is due to the spin-glass state of the near-surface regions.

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Публикация на русском языке Исследование наночастиц биогенного ферригидрита методом ферромагнитного резонанса: спин-стекольное состояние поверхностных спинов [Текст] / С. В. Столяр, Д. А. Балаев, В. П. Ладыгина [и др.] // Письма в ЖЭТФ. - 2020. - Т. 111 Вып. 3. - С. 197-202

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

Доп.точки доступа:
Stolyar, S. V.; Столяр, Сергей Викторович; Balaev, D. A.; Балаев, Дмитрий Александрович; Ladygina, V. P.; Pankrats, A. I.; Панкрац, Анатолий Иванович; Yaroslavtsev, R. N.; Ярославцев, Роман Николаевич; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Iskhakov, R. S.; Исхаков, Рауф Садыкович
}
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18.

    FMR and TEM Studies of Co and Ni Nanoparticles Implanted in the SiO2 Matrix / I. S. Edelman [et al.] // Appl. Magn. Reson. - 2011. - Vol. 40, Is. 3. - P363-375, DOI 10.1007/s00723-011-0218-4. - Cited Reference Count: 51. - Гранты: The work was supported in part by the Russian Foundation for Basic Research, grant no. 11-02-00972-a, Ministry of Education and Science of the Russian Federation, Federal Target Program "Scientific and scientific-pedagogical personnel of innovative Russia'', contract no. 02.740.11.0797, and State Program "Development of the Scientific Potential of the Higher Education School'', project no. 2.1.1/6038. S.M. Zharkov acknowledges the financial support of the Russian government contract no. 02.740.11.0568. The electron microscopy investigations were carried out at the Joint Center of the Siberian Federal University. - Финансирующая организация: Russian Foundation for Basic Research [11-02-00972-a]; Ministry of Education and Science of the Russian Federation [02.740.11.0797]; State Program "Development of the Scientific Potential of the Higher Education School'' [2.1.1/6038]; Russian government [02.740.11.0568] . - MAY. - ISSN 0937-9347. - ISSN 1613-7507
Рубрики:
FERROMAGNETIC-RESONANCE
   MAGNETIC-PROPERTIES
   THIN-FILMS
   COBALT NANOPARTICLES
   ION-IMPLANTATION
   FINE PARTICLES
   GRANULAR FILMS
   ANISOTROPY
   POLYIMIDES
   RUTILE
Кл.слова (ненормированные):
energy dispersive x ray spectroscopy -- face-centered cubic structure -- fused silica plates -- g factors -- hexagonal close packing -- high dose -- high-dose implantation -- implantation dose -- implanted samples -- line shape -- magnetic parameters -- matrix -- metal nanoparticles -- ni nanoparticles -- nonsymmetric -- out-of-plane -- room temperature -- spherical shape -- subsurface layer -- tem -- temperature dependence -- thin magnetic films -- uniaxial magnetic anisotropy -- cobalt -- fused silica -- magnetic anisotropy -- nanoparticles -- silica -- silicon compounds -- transmission electron microscopy -- x ray spectroscopy -- ferromagnetic resonance
Аннотация: Fused silica plates have been implanted with 40 keV Co+ or Ni+ ions to high doses in the range of (0.25-1.0) x 10(17) ions/cm(2), and magnetic properties of the implanted samples have been studied with ferromagnetic resonance (FMR) technique supplemented by transmission electron microscopy, electron diffraction and energy dispersive X-ray spectroscopy. The high-dose implantation with 3d-ions results in the formation of cobalt and nickel metal nanoparticles in the irradiated subsurface layer of the SiO2 matrix. Co and Ni nanocrystals with hexagonal close packing and face-centered cubic structures have a spherical shape and the sizes of 4-5 nm (for cobalt) and 6-14 nm (for nickel) in diameter. Room-temperature FMR signals from ensembles of Co and Ni nanoparticles implanted in the SiO2 matrix exhibit an out-of-plane uniaxial magnetic anisotropy that is typical for thin magnetic films. The dose and temperature dependences of FMR spectra have been analyzed using the Kittel formalism, and the effective magnetization and g-factor values have been obtained for Co- and Ni-implanted samples. Nonsymmetric FMR line shapes have been fitted by a sum of two symmetrical curves. The dependences of the magnetic parameters of each curve on the implantation dose and temperature are presented.

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Держатели документа:
Siberian Fed Univ, Krasnoyarsk 660041, Russia
Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Zavoisky Physical-Technical Institute,Russian Academy of Sciences

Доп.точки доступа:
Edelman, I. S.; Эдельман, Ирина Самсоновна; Petrakovskaja, E. A.; Петраковская, Элеонора Анатольевна; Petrov, D. A.; Петров, Дмитрий Анатольевич; Zharkov, S. M.; Жарков, Сергей Михайлович; Khaibullin, R. I.; Nuzhdin, V. I.; Stepanov, A. L.
}
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19.

Formation of ferromagnetic germanides by solid-state reactions in 20Ge/80Mn films / V. G. Myagkov [et al.] // Thin Solid Films. - 2014. - Vol. 552. - P. 86-91, DOI 10.1016/j.tsf.2013.12.029. - Cited References: 53 . - ISSN 0040-6090

РУБ Materials Science, Multidisciplinary + Materials Science, Coatings & Films + Physics, Applied + Physics, Condensed Matter
Рубрики:
PHASE-FORMATION
   MAGNETIC-PROPERTIES
   Mn5Ge3 FILMS
   X-RAY
   Ge(111)
   TRANSFORMATIONS
   DIFFUSION
   SPECTRA
   SYSTEM
   LAYERS
Кл.слова (ненормированные):
Manganite-germanium -- Solid state reaction -- First phase -- Mn5Ge3 alloy -- Carbon impurity -- Oxygen impurity -- Annealing -- Magnetic anisotropy
Аннотация: Solid state reactions between Ge and Mn films are systematically examined using X-ray diffraction, photoelectron spectroscopy, and magnetic and electrical measurements. The films have a nominal atomic ratio Ge:Mn = 20:80 and are investigated at temperatures from 50 to 500 °C. It is established that after annealing at ~ 120°C, the ferromagnetic Mn5Ge3 phase is the first phase to form at the 20Ge/80Mn interface. As the annealing temperature increases to 300°C, the weak magnetic Mn5Ge 2 + Mn3Ge phases simultaneously begin to grow and they become dominant at 400°C. Increasing the annealing temperature to 500°C leads to the formation of the ferromagnetic phase with a Curie temperature TC ~ 350-360 K and magnetization 14-25 kA/m at room temperature. The X-ray diffraction study of the samples shows the reflections from the Mn 5Ge3 phase, and the photoelectron spectra contain the oxygen and carbon peaks. The homogeneous distribution of oxygen and carbon over the sample thickness suggests that the increased Curie temperature and magnetization are related to the migration of C and O atoms into the Mn 5Ge3 lattice and the formation of the Nowotny phase Mn5Ge3CxOy. The initiation temperature (~ 120 C) is the same in the Mn5Ge3 phase with the solid-state reactions in the Ge/Mn films as well as in the phase separation in the GexMn1 - x diluted semiconductors. Thus, we conclude that the synthesis of the Mn5Ge3 phase is the moving force for the spinodal decomposition of the GexMn 1 - x diluted semiconductors.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Russian Acad Sci, Inst Chem & Chem Technol, Siberian Branch, Krasnoyarsk 660049, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia

Доп.точки доступа:
Myagkov, V. G.; Мягков, Виктор Григорьевич; Zhigalov, V. S.; Жигалов, Виктор Степанович; Matsynin, A. A.; Мацынин, Алексей Александрович; Bykova, L. E.; Быкова, Людмила Евгеньевна; Mikhlin, Y. L.; Bondarenko, G. N.; Бондаренко, Галина Николаевна; Patrin, G. S.; Патрин, Геннадий Семёнович; Yurkin, G. Yu.; Юркин, Глеб Юрьевич
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20.

APLESNIN, S. S.
FORMATION OF FERROMAGNETIC ORDER IN ANISOTROPIC FRUSTRATED ANTIFERROMAGNETS / S. S. APLESNIN // Fiz. Tverd. Tela. - 1992. - Vol. 34, Is. 2. - P. 554-560. - Cited References: 5 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
COMPETING INTERACTIONS
MAGNETIC-PROPERTIES

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