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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ivanova N. B., Kazak N. V., Markov V. V., Ovchinnikov S. G., Rudenko V. V., Abd-Elmeguid M. M.
Заглавие : 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
Место публикации : Phys. Solid State: AMER INST PHYSICS, 2004. - Vol. 46, Is. 8. - P1462-1468. - ISSN 1063-7834, DOI 10.1134/1.1788779
Примечания : 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"
Предметные 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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Petrakovskii G. A., Ryabinkina L. I., Abramova G. M., Velikanov D. A., Bovina A. F.
Заглавие : Antiferromagnet-ferromagnet transition in alpha-MnxS manganese sulfides
Разночтения заглавия :авие SCOPUS: Antiferromagnet-ferromagnet transition in α-MnxS manganese sulfides; авие SCOPUS: Antiferromagnet-ferromagnet transition in ?-MnxS manganese sulfides
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2001. - Vol. 43, Is. 3. - P493-495. - ISSN 1063-7834, DOI 10.1134/1.1356126; Phys. Solid State. - 2001. - Vol. 43, Is. 3. - P493-495. - Вариант Sopus
Примечания : Cited References: 7
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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aplesnin S. S., Piskunova N. I.
Заглавие : Influence of the four-spin exchange interaction on the magnetic properties of manganites
Место публикации : J. Phys.: Condens. Matter: IOP PUBLISHING LTD, 2005. - Vol. 17, Is. 37. - P.5881-5888. - ISSN 0953-8984, DOI 10.1088/0953-8984/17/37/023
Примечания : Cited References: 18
Предметные рубрики: METAL-INSULATOR-TRANSITION
PHASE
SUSCEPTIBILITY
LA1-XSRXMNO3
FERROMAGNET
TRANSPORT
Ключевые слова (''Своб.индексиров.''): computer simulation--ion exchange--lanthanum compounds--magnetic properties--monte carlo methods--phase diagrams--phase transitions--four-spin exchange interaction--magnetic phase diagram--manganites--metal-dielectric transition--manganese compounds
Аннотация: It is shown that non-Heisenberg exchange interaction should be taken into account to reproduce the magnetic phase diagram of La(1-x)A(x)MnO(3) (A = Ca, Sr) using only effective exchange parameters and spins. The formation of the four-spin exchange arises from carrier hopping and coincides with the critical concentration metal-dielectric transition. The two- and four-spin exchange parameters are determined by Monte Carlo simulations.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Begunovich L. V., Korshunov M. M., Ovchinnikov S. G.
Заглавие : Magnetic collapse in Fe3Se4 under high pressure
Место публикации : Materials. - 2022. - Vol. 15, Is. 13. - Ст.4583. - ISSN 19961944 (ISSN), DOI 10.3390/ma15134583
Примечания : Cited References: 27. - L.V.B. and S.G.O. acknowledge the support of the Russian Science Foundation (Project 18-12-00022Π). We acknowledge the useful discussions with M.A. Vysotin. L.V.B. would like to thank the Information Technology Center, Novosibirsk State University, for providing access to their supercomputer facilities
Аннотация: Electronic structure and magnetic properties of Fe3Se4 are calculated using the density functional approach. Due to the metallic properties, magnetic moments of the iron atoms in two nonequivalent positions in the unit cell are different from ionic values for Fe3+ and Fe2+ and are equal to M1=2.071μB and M2=−2.042μB, making the system ferrimagnetic. The total magnetic moment for the unit cell is 2.135μB. Under isotropic compression, the total magnetic moment decreases non-monotonically and correlates with the non-monotonic dependence of the density of states at the Fermi level N(EF). For 7% compression, the magnetic order changes from the ferrimagnetic to the ferromagnetic. At 14% compression, the magnetic order disappears and the total magnetic moment becomes zero, leaving the system in a paramagnetic state. This compression corresponds to the pressure of 114 GPa. The magnetic ordering changes faster upon application of an isotropic external pressure due to the sizeable anisotropy of the chemical bondings in Fe3Se4. The ferrimagnetic and paramagnetic states occur under pressures of 5.0 and 8.0 GPa, respectively. The system remains in the metallic state for all values of compression.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Berzhanskii V. N., Ivanov V. I.
Заглавие : Ccritical relaxation in CDCR2SE4 ferromagnet
Место публикации : Fiz. Tverd. Tela. - 1980. - Vol. 22, Is. 6. - P.1871-1873. - ISSN 0367-3294
Примечания : Cited References: 7
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Belyaeva A. I., Kotlyarskii M. M., Popov F. A., Edelman I. S.
Заглавие : Comparative-study of polytype phase energy-spectrum of RbMnCl3 anti-ferromagnet
Место публикации : Fiz. Tverd. Tela. - 1980. - Vol. 22, Is. 3. - P.645-651. - ISSN 0367-3294
Примечания : Cited References: 16
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Tarasov A. S., Lukyanenko A. V., Bondarev I. A., Rautskii M. V., Baron F. A., Smolyarova T. E., Yakovlev I. A., Varnakov S. N., Ovchinnikov S. G., Volkov N. V.
Заглавие : Fabrication and DC/AC characterization of 3-terminal ferromagnet/silicon spintronics devices
Место публикации : Semiconductors. - 2018. - Vol. 52, Is. 14. - P.1875–1878. - ISSN 1063-7826, DOI 10.1134/S1063782618140312. - ISSN 1090-6479 (eISSN)
Примечания : 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”.
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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Troyanchuk I. O., Bushinsky M. V., Tereshko N. V., Lanovsky R. A., Sikolenko V. V., Ritter C., Orlov Yu. S., Ovchinnikov S. G.
Заглавие : Ferromagnet-antiferromagnet transition in layered perovskites of Sr3YCo4O10.5 type
Коллективы : 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]
Место публикации : Mater. Res. Express. - 2019. - Vol. 6, Is. 2. - Ст.026105. - ISSN 2053-1591, DOI 10.1088/2053-1591/aaef21
Примечания : 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.
Предметные рубрики: SPIN
NANOWIRES
Ключевые слова (''Своб.индексиров.''): 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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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Pankrats A. I., Sablina K. A., Balaev A. D., Eremin M., Kolkov M. I., Tugarinov V. I., Bovina A. F.
Заглавие : Ferromagnetism and strong magnetic anisotropy of the orthoborate PbMnBO4 single crystals
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : 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. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : References: 3. - This work is supported by the RFBR grant No. 16-02-00563
Ключевые слова (''Своб.индексиров.''): ferromagnet--resonance--single crystal
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Frolov G. I., Seredkin V. A., Yakovchuk V. Y.
Заглавие : Parameters of the transition layer in the exchange-biased NiFe/DyCo film structure
Место публикации : Phys. Solid State: MAIK NAUKA/INTERPERIODICA/SPRINGER, 2011. - Vol. 53, Is. 7. - P1348-1352. - ISSN 1063-7834, DOI 10.1134/S1063783411070109
Примечания : Cited References: 19. - This study was supported the Ministry of Education and Science of the Russian Federation within the Analytic Department Targeted Program "Development of the Scientific Potential of the Higher School" (project nos. RNP 2.1.1/4399 and RNP 2.1.1/3498).
Предметные рубрики: UNIDIRECTIONAL ANISOTROPY
BILAYERS
ANTIFERROMAGNET
FERROMAGNET
Аннотация: The parameters of the transition layer in exchange-biased film structures are necessary agents to understand the mechanism of formation of unidirectional anisotropy. The layer thickness in NiFe/DyCo films has been determined by comparison of signals of the polar magneto-optical Kerr effect from a reference DyCo film and a hard magnetic layer of the exchange-biased structure. The layer thickness obtained is one order of magnitude larger than that characteristic of ferromagnet-antiferromagnet bilayer films. The mechanism of magnetization reversal of the structure under study has been explained within the model suggesting the formation of 180A degrees boundaries in the interface.
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11.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Martynov S. N.
Заглавие : Ground state of the classical frustrated heisenberg ferromagnet in a magnetic field
Коллективы : Moscow International Symposium on Magnetism, Московский государственный университет им. М.В. Ломоносова, Российский фонд фундаментальных исследований
Место публикации : Moscow International Symposium on Magnetism (MISM-2017): 1-7 July 2017 : book of abstracts. - 2017. - Ст.4PO-K-37. - P.939 (Шифр 29916280)
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : IGNATCHENKO V. A., ISKHAKOV R. S.
Заглавие : CORRELATION-FUNCTIONS OF RANDOM ANISOTROPY AND THE PROBLEM OF FERROMAGNET STATE STABILITY
Место публикации : Journal de Physique. - 1988. - Vol. 49, Is. C-8. - P.1245-1246. - ISSN 0302-0738, DOI 10.1051/jphyscol:19888565
Примечания : Cited References: 8
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ignatchenko V. A., Polukhin D. S.
Заглавие : Effect of cross correlations between inhomogeneities on the spectrum and damping of spin and elastic waves
Коллективы :
Место публикации : Low Temp. Phys. - 2010. - Vol. 36, Is. 8-9. - P.741-746. - ISSN 1063-777X, DOI 10.1063/1.3490860; \b Физика низких температур
Примечания : 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.
Предметные 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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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Karaev A. A., Sokolov B. Y., Fedorov Y. M.
Заглавие : Induced magnetic superstructure in the FeBO3 : Mg weak ferromagnet
Место публикации : Phys. Solid State: AMER INST PHYSICS, 2000. - Vol. 42, Is. 11. - P2097-2102. - ISSN 1063-7834, DOI 10.1134/1.1324046
Примечания : Cited References: 13
Аннотация: The domain structure of a FeBO3 : Mg single crystal was studied with a polarizing microscope. It was found that application of a magnetic field along the hard axis in the basal plane of this weak ferromagnet gives rise, within a certain field-strength interval, to a magnetic superstructure observed against the background of the macrodomain structure of the sample. The magnetic superstructure is visually represented as a quasi-periodic system of bands oriented perpendicular to the applied field, with an alternating magneto-optic image contrast along an axis coinciding with the magnetic-field direction. The absence of sharp changes in the contrast of the magnetic superstructure image along this axis is explained as being due to the smooth variation of the sublattice magnetic-moment azimuth with spatial coordinates. The results obtained are discussed within the parameters of the instability of a uniform magnetic state of a system in the random field induced by a magnetic field. (C) 2000 MAIK "Nauka/Interperiodica".
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kim J., Shvyd'ko Y., Ovchinnikov S. G.
Заглавие : Charge transfer and Mott-Hubbard excitations in FeBO3: An Fe K-edge resonant inelastic x-ray scattering study
Разночтения заглавия :авие SCOPUS: Charge transfer and Mott-Hubbard excitations in FeBO 3: An Fe K-edge resonant inelastic x-ray scattering study
Место публикации : Phys. Rev. B: AMER PHYSICAL SOC, 2011. - Vol. 83, Is. 23. - Ст.235109. - ISSN 1098-0121, DOI 10.1103/PhysRevB.83.235109
Примечания : 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.
Предметные 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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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Kuzmin E. V., Petrakovskii G. A.
Заглавие : Thermodynamics of quasi-2-dimensional heisenberg-ferromagnet with single-ion-anisotropy
Место публикации : Fiz. Tverd. Tela. - 1986. - Vol. 28, Is. 11. - P.3551-3553. - ISSN 0367-3294
Примечания : Cited References: 4
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : MALTSEV V. K., TSIFRINOVICH V. I., BAKSHEEV N. V., ULYANOV V. D.
Заглавие : LOW-FREQUENCY MAGNETIC FIELD-INDUCED MAGNETIC-FIELD VARIATION AT FERROMAGNET NUCLEI
Место публикации : Fiz. Tverd. Tela: MEZHDUNARODNAYA KNIGA, 1990. - Vol. 32, Is. 6. - P1591-1596. - ISSN 0367-3294
Примечания : Cited References: 4
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18.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Pankrats A. I., Kolkov M. I., Popkov S. I., Sablina K. A., Balaev A. D., Miskiv A.
Заглавие : Magnetic order-disorder transition in the ferromagnet PbMnBO4 under the external magnetic field
Коллективы : Moscow International Symposium on Magnetism, Московский государственный университет им. М.В. Ломоносова, Российский фонд фундаментальных исследований
Место публикации : Moscow International Symposium on Magnetism (MISM-2017): 1-7 July 2017 : book of abstracts. - 2017. - Ст.4PO-I1-45. - P.900 (Шифр 29916280)
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19.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Volkov N.N., Eremin E.V., Sablina K.A., Sapronova N.V.
Заглавие : Magnetoelectric effect in MnGeO3 anti ferromagnet
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Уральское отделение РАН
Место публикации : IV Euro-Asian Symposium "Trends in MAGnetism" Nanospintronics (EASTMAG-2010). School for young scientist "Spintronics": June 28 - Lule 2, 2010"Book of abstracts. - Ekaterinburg, 2010. - P.74
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Man'kov Y. I.
Заглавие : Effect of conduction electrons on the law of approach to saturation of a metallic ferromagnet with surface pinning of the magnetic moment
Место публикации : Phys. Solid State: AMER INST PHYSICS, 1999. - Vol. 41, Is. 4. - P582-588. - ISSN 1063-7834, DOI 10.1134/1.1130829
Примечания : Cited References: 37
Предметные 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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