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Valkov, V. V.
2-MAGNON EXCITATION SPECTRUM IN AN EASY AXIS QUASI TWO-DIMENSIONAL FERROMAGNET / V. V. VALKOV, S. G. OVCHINNIKOV, O. G. PETRAKOVSKII // Fiz. Tverd. Tela. - 1988. - Vol. 30, Is. 10. - P. 3044-3047. - Cited References: 6 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

WOS
Доп.точки доступа:
Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Petrakovskii, G. A.; Петраковский, Герман Антонович; Val'kov, V. V.
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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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Zakharov, Yu. V.
Anisotropy of the magnetoresistance along and across domain-walls in a ferromagnet / Yu. V. Zakharov, Yu. I. Mankov, L. S. Titov // J. Phys. I. - 1991. - Vol. 1, Is. 5. - P. 759-764. - Cited References: 20 . - ISSN 1155-4304

РУБ Physics, Multidisciplinary
Рубрики:
SUPERCONDUCTIVITY
HOMO6S8
Аннотация: We discuss some peculiarities of the conduction electron motion in the vicinity of domain walls which lead to an anisotropy of the magnetoresistance. We also discuss the case of single crystals of ErRh4B4 and HoMo6S8 where magnetoresistance with the same qualitative features has been observed.

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Доп.точки доступа:
Mankov, Yu. I.; Маньков, Юрий Иннокентьевич; Titov, L. S.; Захаров, Юрий Владимирович
}
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Antiferromagnet-ferromagnet transition in alpha-MnxS manganese sulfides / G. A. Petrakovskii [et al.] // Phys. Solid State. - 2001. - Vol. 43, Is. 3. - P. 493-495 ; Phys. Solid State. - 2001. - Vol. 43, Is. 3. - P. 493-495, DOI 10.1134/1.1356126. - Cited References: 7 . - ISSN 1063-7834. - Вариант Sopus

РУБ Physics, Condensed Matter

Аннотация: Off-stoichiometric manganese monosulfides alpha -MnxS (1 less than or equal to x less than or equal to 1.25) are synthesized, and their crystal structure and magnetic properties are studied in the 4.2- to 300-K range. The compounds have a NaCl fcc lattice. Increasing the manganese ion concentration x in the antiferromagnetic semiconductors alpha -MnxS is found to result in concentration- (x(c) similar to 1.05) and temperature-driven (T-c similar to 50 K) magnetic transitions from the antiferromagnetic to ferromagnetic state, with the cubic structure remaining unchanged. (C) 2001 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Kirenskii Inst. of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk State University, Krasnoyarsk, 660041, Russian Federation
Kirenskii Inst. of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Krasnoyarsk State University, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Petrakovskii, G. A.; Петраковский, Герман Антонович; Ryabinkina, L. I.; Рябинкина, Людмила Ивановна; Abramova, G. M.; Абрамова, Галина Михайловна; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Bovina, A. F.; Бовина, Ася Федоровна

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Berzhanskii, V. N.
Ccritical relaxation in CDCR2SE4 ferromagnet / V. N. Berzhanskii, V. I. Ivanov // Fiz. Tverd. Tela. - 1980. - Vol. 22, Is. 6. - P. 1871-1873. - Cited References: 7 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

WOS

Доп.точки доступа:
Ivanov, V. I.; Бержанский, Владимир Наумович
}
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Kim, J.
Charge transfer and Mott-Hubbard excitations in FeBO3: An Fe K-edge resonant inelastic x-ray scattering study / J. . Kim, Y. . Shvyd'ko, S. G. Ovchinnikov // Phys. Rev. B. - 2011. - Vol. 83, Is. 23. - Ст. 235109, DOI 10.1103/PhysRevB.83.235109. - Cited References: 67. - Yu.Sh. acknowledges the long-standing effort of his colleagues from the IXS Collaborative Design Team in building MERIX instrument at the XOR-IXS 30-ID beamline at the APS, in particular, J. Hill, S. Coburn (BNL), C. Burns (WMU), E. Alp, T. Toellner, and H. Sinn (APS). He is also indebted to R. Khachatryan (APS), M. Wieczorek (APS), and A. Said (APS) for the help in manufacturing the Ge(620) analyzer. P. Siddons (BNL) is acknowledged for building the microstrip detector for the MERIX spectrometer. The help of the XOR-IXS 30-ID beamline personnel at the Advanced Photon Source: T. Roberts, A. Said, and M. Upton are greatly appreciated. Use of the Advanced Photon Source was supported by the US DOE, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. S.O. acknowledges Russian Academy of Science Physical Department program 5.7 "Strongly correlated electrons," RFFI Grant No. 09-02-00171, RFFI Grant No. 10-02-00251, and the Siberian-Ural integration Project No. 40. . - ISSN 1098-0121

РУБ Physics, Condensed Matter
Рубрики:
TRANSITION-METAL COMPOUNDS
   ELECTRONIC-STRUCTURE
   OPTICAL-PROPERTIES
   ABSORPTION-SPECTRA
   EMISSION SPECTRA
   FERROMAGNET
   DEPENDENCE
   COMPLEXES
   RAMAN
Аннотация: Momentum-resolved resonant inelastic x-ray scattering (RIXS) spectroscopy has been carried out successfully at the Fe K-edge for the first time. The RIXS spectra of a FeBO3 single crystal reveal a wealth of information on similar or equal to 1-10 eV electronic excitations. The IXS signal resonates when the incident photon energy approaches the pre-edge (1s-3d) and the main-edge (1s-4p) of the Fe K-edge absorption spectrum. The RIXS spectra measured at the pre-edge and the main-edge show quantitatively different dependences on the incident photon energy, momentum transfer, photon polarization, and temperature. We present a multielectron analysis of the Mott-Hubbard (MH) and charge transfer (CT) excitations, and calculate their energies. Electronic excitations observed in the pre-edge and main-edge RIXS spectra are interpreted as MH and CT excitations, respectively. We propose the electronic structure around the chemical potential in FeBO3 based on the experimental data.

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Держатели документа:
[Kim, Jungho
Shvyd'ko, Yuri] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA
[Ovchinnikov, S. G.] Russian Acad Sci, Kirensky Inst, Siberian Div, Krasnoyarsk 660036, Russia
[Ovchinnikov, S. G.] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, United States
Kirensky Institute, Siberian Division, Russian Academy of Sciences, 660036, Krasnoyarsk, Russian Federation
Reshetnev Siberian State Aerospace University, 660014, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Shvyd'ko, Y.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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Comparative-study of polytype phase energy-spectrum of RbMnCl3 anti-ferromagnet / A. I. Belyaeva [et al.] // Fiz. Tverd. Tela. - 1980. - Vol. 22, Is. 3. - P. 645-651. - Cited References: 16 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

WOS
Доп.точки доступа:
Belyaeva, A. I.; Kotlyarskii, M. M.; Popov, F. A.; Edelman, I. S.; Эдельман, Ирина Самсоновна
}
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Martynov, S. N.
Continual approach at T=0 in the mean field theory of incommensurate magnetic states in the frustrated Heisenberg ferromagnet with an easy axis anisotropy / S. N. Martynov, V. I. Tugarinov, A. S. Martynov // J. Magn. Magn. Mater. - 2017. - Vol. 440: EURO-Asian Symposium on Trends in Magnetism (EASTMAG) (AUG 15-19, 2016, Siberian Fed Univ, Krasnoyarsk, RUSSIA). - P. 47-49, DOI 10.1016/j.jmmm.2016.12.086. - Cited References:9 . - ISSN 0304-8853. - ISSN 1873-4766

РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
FERRIMAGNET
Кл.слова (ненормированные):
Incommensurate magnetic structures -- Soliton lattice -- Continual approach
Аннотация: The algorithm of approximate solution was developed for the differential equation describing the anharmonical change of the spin orientation angle in the model of ferromagnet with the exchange competition between nearest and next nearest magnetic neighbors and the easy axis exchange anisotropy. The equation was obtained from the collinearity constraint on the discrete lattice. In the low anharmonicity approximation the equation is resulted to an autonomous form and is integrated in quadratures. The obvious dependence of the angle velocity and second derivative of angle from angle and initial condition was derived by expanding the first integral of the equation in the Taylor series in vicinity of initial condition. The ground state of the soliton solutions was calculated by a numerical minimization of the energy integral. The evaluation of the used approximation was made for a triple point of the phase diagram.

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Доп.точки доступа:
Tugarinov, V. I.; Тугаринов, Василий Иванович; Martynov, A. S.; Мартынов, Александр Сергеевич; Мартынов, Сергей Николаевич; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН
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    Martynov, S. N.
    Continual approach in the mean field theory of incommensurate magnetic states in the Frustrated Heisenberg ferromagnet / S. N. Martynov, V. I. Tugarinov, A. S. Martynov // J. Sib. Fed. Univ. Math. Phys. - 2017. - Vol. 10, Is. 1. - P. 55-59 ; Журн. СФУ. Сер. "Математика и физика", DOI 10.17516/1997-1397-2017-10-1-55-59. - Cited References: 3 . - ISSN 1997-1397
   Перевод заглавия: Континуальное приближение в теории среднего поля несоизмеримых магнитных состояний во фрустрированном гейзенберговском ферромагнетике
Кл.слова (ненормированные):
Incommensurate magnetic structures -- Soliton lattice -- Continual approach -- несоизмеримые магнитные структуры -- солитонная решетка -- континуальное приближение
Аннотация: The algorithm of approximate solution has been developed for the differential equation describing the anharmonical change of the spin orientation angle in the model of ferromagnet with the exchange competition between nearest and next nearest magnetic neighbors and the easy axis exchange anisotropy. The obvious dependence of the angle velocity from angle and initial condition has been derived by expanding the first integral of the equation in the Taylor series in vicinity of initial condition. © Siberian Federal University. All rights reserved.
Разработан алгоритм приближенного решения дифференциального уравнения, описывающего ангармоническое изменение угла ориентации спина в модели легкоосного ферромагнетика с конкуренцией обменов между ближайшими и следующими за ближайшими магнитными соседями. Явная зависимость угловой скорости от угла и начального условия получена путем разложения первого интеграла уравнения в ряд Тейлора в окрестности начального условия

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Держатели документа:
Kirensky Institute of Physics, SB RAS, Akademgorodok, 50/38, Krasnoyarsk, Russian Federation
Faculty of Physics, Moscow State University, Moscow, Russian Federation

Доп.точки доступа:
Tugarinov, V. I.; Тугаринов, Василий Иванович; Martynov, A. S.; Мартынов, Александр Сергеевич; Мартынов, Сергей Николаевич

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10.

IGNATCHENKO, V. A.
CORRELATION-FUNCTIONS OF RANDOM ANISOTROPY AND THE PROBLEM OF FERROMAGNET STATE STABILITY / V. A. IGNATCHENKO, R. S. ISKHAKOV // Journal de Physique. - 1988. - Vol. 49, Is. C-8. - P. 1245-1246, DOI 10.1051/jphyscol:19888565. - Cited References: 8 . - ISSN 0302-0738

РУБ Physics, Multidisciplinary

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Держатели документа:
LV KIRENSKII PHYS INST,KRASNOYARSK 660036,USSR
ИФ СО РАН
Доп.точки доступа:
ISKHAKOV, R. S.; Исхаков, Рауф Садыкович; Игнатченко, Вальтер Алексеевич
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11.

PETRAKOVSKII, G. A.
CRITICAL LINE BROADENING OF THE ELECTRON-PARAMAGNETIC-RES IN THE TWO-DIMENSIONAL ANTI-FERROMAGNET CRYSTALS RB2MNCL4 AND RB2MN0,8CD0,2CL4 / G. A. PETRAKOVSKII, L. S. YEMELYANOVA, V. V. VELICHKO // Solid State Commun. - 1983. - Vol. 48, Is. 8. - P. 647-651, DOI 10.1016/0038-1098(83)90043-1. - Cited References: 17 . - ISSN 0038-1098

РУБ Physics, Condensed Matter

WOS
Доп.точки доступа:
YEMELYANOVA, L. S.; VELICHKO, V. V.; Петраковский, Герман Антонович
}
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12.

Zakharov, Yu. V.
Eelectric-conductivity of a metallic ferromagnet and magnetization process / Yu. V. Zakharov, Yu. I. Mankov, L. S. Titov // Phys. Status Solidi B. - 1988. - Vol. 149, Is. 1. - P. 241-248, DOI 10.1002/pssb.2221490126. - Cited References: 14 . - ISSN 0370-1972

РУБ Physics, Condensed Matter

WOS
Доп.точки доступа:
Mankov, Yu. I.; Маньков, Юрий Иннокентьевич; Titov, L.S.; Захаров, Юрий Владимирович
}
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13.

Man'kov, Y. I.
Effect of conduction electrons on the law of approach to saturation of a metallic ferromagnet with surface pinning of the magnetic moment / Y. I. Man'kov // Phys. Solid State. - 1999. - Vol. 41, Is. 4. - P. 582-588, DOI 10.1134/1.1130829. - Cited References: 37 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
ANISOTROPY
Аннотация: The effect of conduction electrons on the magnetization curve of a metallic ferromagnet with surface pinning of the magnetic moment is investigated theoretically. The electronic contribution is due to the rearrangement of the discrete spectrum of charge carriers trapped by the nonuniform magnetic induction of such a ferromagnet, and it is a kind of diamagnetic effect that appreciably decreases the volume-averaged magnetization of the ferromagnet. A power-law dependence H-3/4 on the external magnetic field H is obtained according to the law of magnetization approach to saturation. This dependence is due to the contribution of the conduction electrons. (C) 1999 American Institute of Physics. [S1063-7834(99)01804-3].

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Держатели документа:
Russian Acad Sci, Siberian Branch, LV Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН
}
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14.

Ignatchenko, V. A.
Effect of cross correlations between inhomogeneities on the spectrum and damping of spin and elastic waves / V. A. Ignatchenko, D. S. Polukhin // Low Temp. Phys. - 2010. - Vol. 36, Is. 8-9. - P. 741-746 ; Физика низких температур, DOI 10.1063/1.3490860. - Cited References: 13. - This work was partially supported by Program No. 27 of the Presidium of the Russian Academy of Sciences, State contract No. 02.740.11.0220 as part of the Federal targeted program and the State program "Development of the scientific potential of higher education," project No. 2.1.1/3498. . - ISSN 1063-777X

РУБ Physics, Applied
Рубрики:
FERROMAGNET
Аннотация: This is a study of the dispersion relations and damping of spin waves in ferromagnets with inhomogeneities in their exchange and magnetic anisotropy parameters and of elastic waves in isotropic media with inhomogeneities in the density of matter and in the elastic force constants, with cross correlations between these inhomogeneities taken into account. A general behavior is found which is independent of the physical nature of the waves: the kind of effect cross correlations between inhomogeneities in any two parameters of a material will have on the wave spectrum depends on whether both parameters belong to the same (i.e., both belong to the kinetic part or both belong to the potential part) or to different parts of the hamiltonian. In the former case, positive cross correlations lead to a substantial modification of the dispersion relation and to increased wave damping, and in the latter case, to a smaller modification of these characteristics. On the other hand, negative cross correlations lead to the opposite effects in both cases. This behavior is explained qualitatively. (c) 2010 American Institute of Physics. [doi:10.1063/1.3490860]

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Держатели документа:
[Ignatchenko, V. A.
Polukhin, D. S.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
L. V. Kirenskii Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Polukhin, D. S.; Полухин, Дмитрий Сергеевич; Игнатченко, Вальтер Алексеевич

}
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15.

Ovchinnikov, S. G.
Exotic superconductivity and magnetism in ruthenates / S. G. Ovchinnikov // Phys. Usp. - 2003. - Vol. 46, Is. 1. - P. 21-44, DOI 10.1070/PU2003v046n01ABEH001235. - Cited References: 167 . - ISSN 1063-7869

РУБ Physics, Multidisciplinary
Рубрики:
ITINERANT FERROMAGNET SRRUO3
   SPIN-TRIPLET SUPERCONDUCTIVITY
   STRONGLY CORRELATED ELECTRONS
   T-J-MODEL
   J-I-MODEL
   TRANSPORT-PROPERTIES
   MOTT-INSULATOR
   FERMI-SURFACE
   LAYERED PEROVSKITE
   RUTHENIUM OXIDES
Кл.слова (ненормированные):
Electronic structure -- Magnetic properties -- Magnetism -- Oxide superconductors -- Strontium alloys -- Superconductivity -- Electron correlations -- Ruthenates -- Rutheno-cuprates -- Spin-triplet pairing -- Ruthenium compounds
Аннотация: Basic experimental and theoretical results on ruthenates and rutheno-cuprates are reviewed. The electronic structure of various ruthenates and exotic superconductivity in Sr2RuO4 with spin-triplet pairing are described. The complex phase diagram of Ca2-xSrxRuO4, involving competing magnetic phases and metal-insulator transitions, is described, as are the exotic magnetic properties of Sr3Ru2O7 and of the double perovskite Sr2YRuO6, and the coexistence of superconductivity and magnetism in the rutheno-cuprate RuSr2GdCu2O8. Possible applications of Sr2RuO4 and SrRuO3 are considered. The effect of strong electron correlations is discussed, and the properties of ruthenates and cuprates are compared.

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Держатели документа:
Russian Acad Sci, LV Kirenskii Inst Phys, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
L V Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, 660036 Krasnoyarsk, Russian Federation

Доп.точки доступа:
Овчинников, Сергей Геннадьевич
}
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16.

    Fabrication and DC/AC characterization of 3-terminal ferromagnet/silicon spintronics devices / A. S. Tarasov [et al.] // Semiconductors. - 2018. - Vol. 52, Is. 14. - P. 1875–1878, DOI 10.1134/S1063782618140312. - Cited References: 10. - The work was supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund project no. 18-42-243022. This work is partially supported by the Ministry of Education and Science of the Russian Federation and by Siberian Branch of the Russian Academy of Sciences (project II.8.70) and Fundamental research program of the Presidium of the RAS no. 32 “Nanostructures: physics, chemistry, biology, basics of technologies”. . - ISSN 1063-7826. - ISSN 1090-6479
   Перевод заглавия: Изготовление и транспортные свойства 3-х терминальных спинтронных устройств ферромагнетик/полупроводник
Аннотация: CMOS and SOI technology compatible structures and devices are currently intensively investigated by many research groups, since various effects observed in such structures can be relatively easy implemented in electronic devices thereby expanding their functionality. The most promising is the research and development of spintronic devices, which will allow using both electron charge and spin degrees of freedom for transmission, storage and processing of information. In this work we report the fabrication process of 3-terminal (3-T) ferromagnet/silicon devices of two types. First is the planar Fe3Si/Si 3-T structure with 5 μm gap between closest ferromagnetic electrodes. Second is silicon nanowire back-gate transistor with Fe film source and drain synthesized on SOI substrate. Transport and magnetotransport properties of both devices are investigated.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk, Russia

Доп.точки доступа:
Tarasov, A. S.; Тарасов, Антон Сергеевич; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Bondarev, I. A.; Бондарев, Илья Александрович; Rautskii, M. V.; Рауцкий, Михаил Владимирович; Baron, F. A.; Барон, Филипп Алексеевич; Smolyarova, T. E.; Смолярова, Татьяна Евгеньевна; Yakovlev, I. A.; Яковлев, Иван Александрович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Volkov, N. V.; Волков, Никита Валентинович
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17.

Ferromagnet-antiferromagnet transition in layered perovskites of Sr3YCo4O10.5 type / I. O. Troyanchuk [et al.] // Mater. Res. Express. - 2019. - Vol. 6, Is. 2. - Ст. 026105, DOI 10.1088/2053-1591/aaef21. - Cited References: 30. - This work was supported by the Belarussian Foundation for Basic Research (project F18R-159) and Russian Foundation Basic Research (contract no. 18-52-00020). Yu S Orlov and SG Ovchinnikov are grateful Russian Foundation Basic Research (contracts no. 18-52-00017 Bel_a, 16-02-00507) and Council on grants of the President of the Russian Federation (SP-1844.2016.1) for the support. . - ISSN 2053-1591

РУБ Materials Science, Multidisciplinary
Рубрики:
SPIN
NANOWIRES
Кл.слова (ненормированные):
neutron diffraction -- orbital ordering -- spin state
Аннотация: Sr1−xYxCoO2.65 (x = 0.2) with layered perovskite structure was studied by neutron diffraction, synchrotron x-ray and magnetometry methods. It is shown that in the 90–375 K temperature range the crystal structure can be described by the monoclinic space group A2/m with the superstructure 4√2a p × 2√2a p × 4a p (with a p corresponding to the unit cell parameter of the primitive cell) while basic diffraction peaks are well indexed in the space group I4/mmm (2a p × 2a p × 4a p ) shows an almost standard magnetization. The basic magnetic structure is G-type antiferromagnetic with average magnetic moments of 2.7 μ B/Co and 1.7 μ B/Co in anion-deficient CoO4+γ and stoichiometric CoO6 layers, respectively. A ferromagnetic component of about 0.27 μ B/Co is determined from the magnetization measurements at 8 K. Sr0.8Y0.2CoO2.65 shows an almost standard magnetization versus temperature dependence whereas Sr0.75Y0.25CoO2.65 exhibits an antiferromagnet-ferromagnet transition accompanied by a structural transformation. There is practically no spontaneous magnetization in x = 0.3. The type of the magnetic structure and the high value of TN suggest that the Co3+ ions are in both structural layers predominantly in the low-spin (LS)/high-spin (HS) state mixture. It is proposed that the ferromagnetic component is due to the orbital ordering occurring at TN in the CoO5 pyramids and the concomitant appearance of ferromagnetic coupling between the Co3+(HS) ions located in these CoO5 pyramids in the anion-deficient CoO4+γ layer.

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Держатели документа:
Natl Acad Sci Belarus Mat Sci, Sci & Pract Ctr, Minsk, BELARUS.
Joint Inst Nucl Res, Dubna, Russia.
Inst Laue Langevin, Grenoble, France.
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk 660074, Russia.

Доп.точки доступа:
Troyanchuk, I. O.; Bushinsky, M. V.; Tereshko, N. V.; Lanovsky, R. A.; Sikolenko, V. V.; Ritter, C.; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Belarussian Foundation for Basic Research [F18R-159]; Russian Foundation Basic Research [18-52-00017 Bel_a, 16-02-00507, 18-52-00020]; Council on grants of the President of the Russian Federation [SP-1844.2016.1]
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18.

Ferromagnetism and strong magnetic anisotropy of the orthoborate PbMnBO4 single crystals / A. I. Pankrats [et al.] // VI Euro-Asian Symposium "Trends in MAGnetism" (EASTMAG-2016) : abstracts / ed.: O. A. Maksimova, R. D. Ivantsov. - Krasnoyarsk : KIP RAS SB, 2016. - Ст. P1.25. - P. 85. - References: 3. - This work is supported by the RFBR grant No. 16-02-00563 . - ISBN 978-5-904603-06-9
Кл.слова (ненормированные):
ferromagnet -- resonance -- single crystal

Доп.точки доступа:
Pankrats, A. I.; Панкрац, Анатолий Иванович; Sablina, K. A.; Саблина, Клара Александровна; Balaev, A. D.; Балаев, Александр Дмитриевич; Eremin, M.; Kolkov, M. I.; Колков, Максим Игоревич; Tugarinov, V. I.; Тугаринов, Василий Иванович; Bovina, A. F.; Бовина, Ася Федоровна; Euro-Asian Symposium "Trends in MAGnetism"(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); "Trends in MAGnetism", Euro-Asian Symposium(6 ; 2016 ; Aug. ; 15-19 ; Krasnoyarsk); Институт физики им. Л.В. Киренского Сибирского отделения РАН

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19.

Martynov, S. N.
Ground State of a Two-Sublattice Anisotropic Ferromagnet in a Magnetic Field / S. N. Martynov // Phys. Solid State. - 2021. - Vol. 63, Is. 8. - P. 1253-1261, DOI 10.1134/S1063783421080199. - Cited References: 38. - This study was supported by the Russian Foundation for Basic Research and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project no. 20-42-240006 "Synthesis and Study of Pb2+-and Bi3+Containing Oxide Single Crystals with Partial Substitution in One of the Subsystems: Magnetic Structures and Magnetodielectric Effect" . - ISSN 1063-7834. - ISSN 1090-6460

РУБ Physics, Condensed Matter
Рубрики:
ANTIFERROMAGNETIC-RESONANCE
SUPEREXCHANGE INTERACTION
WEAK FERROMAGNETISM
Кл.слова (ненормированные):
ferromagnetism -- single-ion anisotropy -- antisymmetric exchange -- orientational phase transition
Аннотация: The ground state of a classical two-sublattice ferromagnet with the noncollinear single-ion anisotropy axes of the sublattices and the antisymmetric and anisotropic symmetric exchanges between them has been investigated in a magnetic field applied along the hard magnetization directions in the crystal. The threshold relations for the parameters of the anisotropic interactions have been obtained, which determine the choice of the ground state among the three possible magnetic phases. Depending on the ground state type and the field direction, the transition between the phases is a first- or second-order phase transition. The antisymmetric exchange value above which the reorientation between the noncollinear phases ends with a second-order transition depends on the angle between the local easy axes and the single-ion anisotropy value. Field dependences of the magnetization and susceptibility for different ground states have been calculated. A comparison with the results of the magnetic measurements in the highly anisotropic PbMnBO4 ferromagnet has been made.

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Публикация на русском языке Мартынов, Сергей Николаевич. Основное состояние двухподрешеточного анизотропного ферромагнетика в магнитном поле [Текст] / С. Н. Мартынов // Физ. тверд. тела. - 2021. - Т. 63 Вып. 8. - С. 1090-1097

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

Доп.точки доступа:
Мартынов, Сергей Николаевич; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR); Krasnoyarsk Territorial Foundation [20-42-240006]
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20.

Ground state of the classical frustrated heisenberg ferromagnet in a magnetic field / S. N. Martynov // Moscow International Symposium on Magnetism (MISM-2017) : 1-7 July 2017 : book of abstracts. - 2017. - Ст. 4PO-K-37. - P. 939

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Материалы конференции,
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Доп.точки доступа:
Martynov, S. N.; Мартынов, Сергей Николаевич; Moscow International Symposium on Magnetism(7 ; 2017 ; Jul. ; Moscow); Московский государственный университет им. М.В. ЛомоносоваРоссийский фонд фундаментальных исследований
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