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Theoretical investigation of magnetic properties in interfaces of magnetic nanoparticles and amorphous carbons / S. -J. Sun [et al.] // J. Magn. Magn. Mater. - 2017. - Vol. 432. - P. 102-105, DOI 10.1016/j.jmmm.2017.02.001. - Cited References: 21. - We would like to thank the Ministry of Science and Technology, Taiwan, for the Grant No. MOST 104-2112-M-390-001 and 104-2923-M-390-001-MY3 (Shih-Jye Sun). The work is supported also by the President of Russia program of the leading scientific schools, Grant NSh-7559.2016.2. . - ISSN 0304-8853
Кл.слова (ненормированные):
Antiferroelectricity -- Antiferromagnetism -- Ferromagnetism -- Molecular dynamics -- Nanomagnetics -- Nanoparticles -- Spin waves -- Antiferro-magnetic interactions -- Antiferromagnetics -- Kondo interactions -- Magnetic nano-particles -- Molecular dynamics simulations -- Spinwave excitation -- Theoretical investigations -- Theoretical modeling -- Amorphous carbon
Аннотация: Based on the experimental finding of the exchange bias in amorphous carbon samples with embedded Co nanoparticles and on the graphited character of the amorphous carbon interface confirmed by molecular dynamics simulations we have proposed the interface of graphited carbon to be antiferromagnetic. A theoretical model, which comprises the Kondo interactions in the interfaces of Co nanoparticles and the induced antiferromagnetic interactions in the graphited carbons, is employed to evaluate the ferromagnetism of the interfaces of Co nanoparticles. We have shown that the ferromagnetism of interfaces of Co nanoparticles will be enhanced by the increase of antiferromagnetic interaction as well as the increase of electron density in the graphited carbons. In particular, we found that the antiferromagnetic interactions in graphited carbons will change the spin-wave excitation in interfaces of Co nanoparticles from the quasiacoustic mode to the quasioptical one. © 2017 Elsevier B.V.

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Держатели документа:
Department of Applied Physics, National University of Kaohsiung, Kaohsiung, Taiwan
Department of Applied Physics, National Pingtung University, Pingtung, Taiwan
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Sun, S.-J.; Hsu, Hua-Shu; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Chen, G.-L.
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The Fermi surface and the role of electronic correlations in Sm2-xCexCuO4 / M. M. Korshunov [et al.] // J. Phys.: Condens. Matter. - 2010. - Vol. 22, Is. 1. - Ст. 15701, DOI 10.1088/0953-8984/22/1/015701. - Cited References: 35. - We would like to thank A A Kordyuk and I Eremin for useful discussions. The authors acknowledge support from RFBR (grants 08-02-00021, 10-02-00662, 08-02-91200 and 07-02-00226), the RAS programs on 'Low temperature quantum phenomena', 'Quantum physics of condensed matter' and 'Strongly correlated electrons solids', President of Russia (grants MK-614.2009.2 (IN) and MK-3227.2008.2 (ZP)), Scientific School (grant SS-1929.2008.2), Interdisciplinary UB-SB RAS project, Dynasty Foundation (ZP) and Russian Science Support Foundation (IN). . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
T-C SUPERCONDUCTOR
   IN-GAP STATES
   SPIN CORRELATIONS
   BAND
   LA2-XSRXCUO4
   EXCITATIONS
   TRANSITION
   EVOLUTION
   SM2CUO4
   OXIDES
Кл.слова (ненормированные):
Antiferromagnetics -- Doping evolution -- Electron-doped -- Electronic correlation -- Emery model -- Experimental data -- Generalized tight bindings -- High-T -- Hybrid scheme -- Magnetic orders -- Spin-liquid -- Tight binding model -- Two-regime -- Antiferromagnetism -- Cerium -- Cerium compounds -- Copper oxides -- Corundum -- Doping (additives) -- Fermi surface -- Fermions -- Tin -- Surfaces
Аннотация: Using a LDA + GTB (local density approximation + generalized tight-binding) hybrid scheme we investigate the band structure of the electron-doped high-T-c material Sm2-xCexCuO4. Parameters of the minimal tight-binding model for this system (the so-called three-band Emery model) were obtained within the NMTO (Nth-order muffin-tin orbital) method. The doping evolution of the dispersion and the Fermi surface in the presence of electronic correlations was investigated in two regimes of magnetic order: short-range (spin-liquid) and long-range (antiferromagnetic metal). Each regime is characterized by the specific topologies of the Fermi surfaces and we discuss their relation to recent experimental data.

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Держатели документа:
[Korshunov, M. M.] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[Korshunov, M. M.
Zakharova, E. V.
Ovchinnikov, S. G.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Nekrasov, I. A.] Russian Acad Sci, Inst Electrophys, Ekaterinburg 620016, Russia
[Pchelkina, Z. V.] Russian Acad Sci, Inst Met Phys, Ekaterinburg 620219, Russia
[Ovchinnikov, S. G.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Max-Planck-Institut fur Physik Komplexer Systeme, D-01187 Dresden, Germany
L v Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, 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
Siberian Federal University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Korshunov, M. M.; Коршунов, Максим Михайлович; Zakharova, E. V.; Nekrasov, I. A.; Pchelkina, Z. V.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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Synthesizing antiferromagnetic α-Fe2O3–rGO discs: Their magnetic and magneto-optical properties / A. V. Kurilova, A. E. Sokolov, A. L. Sukhachev [et al.] // Bull. Russ. Acad. Sci. Phys. - 2022. - Vol. 86, Is. 5. - P. 610-613, DOI 10.3103/S106287382205015X. - Cited References: 26 . - ISSN 1062-8738
Кл.слова (ненормированные):
Hematite -- Optical properties -- Antiferromagnetics -- Graphene layers -- Hematite nanoparticles -- Hybrid structure -- Magnetic and magneto-optical properties -- Reduced graphene oxides -- Uniform distribution
Аннотация: A comprehensive study is performed of the properties of hybrid structures of iron oxide and reduced graphene oxide α-Fe2O3/rGO synthesized via “wet mixing.” It is shown that hematite nanoparticles with a comparatively uniform distribution can be encapsulated in graphene layers, and the way of preparing precursors is of critical importance in shaping the magneto-optical properties of α-Fe2O3/rGO hybrid structures.

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Публикация на русском языке Синтез, магнитные и магнитооптические свойства антиферромагнитных нанодисков α-Fe2O3–rGO [Текст] / А. В. Курилова, А. Э. Соколов, А. Л. Сухачев [и др.] // Изв. РАН. Сер. физич. - 2022. - Т. 86 № 5. - С. 726-729

Держатели документа:
ITMO National Research University, St. Petersburg, 197101, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Kurilova, A. V.; Sokolov, A. Е.; Соколов, Алексей Эдуардович; Sukhachev, A. L.; Сухачев, Александр Леонидович; Ivanova, O. S.; Иванова, Оксана Станиславовна; Bogdanov, K. V.; Baranov, M. A.; Dubavik, A. Y.
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BAYUKOV, O. A.
SINGLE-ION-ANISOTROPY INDUCED BY EXCHANGE-TYPE COVALENCE EFFECTS IN RHOMBOHEDRAL ANTIFERROMAGNETICS WITH S-IONS / O. A. BAYUKOV, V. V. RUDENKO // Fiz. Tverd. Tela. - 1992. - Vol. 34, Is. 8. - P. 2665-2667. - Cited References: 15 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
RESONANCE

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

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

Доп.точки доступа:
Chzhan, A.V.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Isaeva, T. N.; Patrin, G. S.; Патрин, Геннадий Семёнович; Moscow International Symposium on Magnetism(4 ; 2008 ; Jun. ; Moscow)
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    Probing magnetic sublattices in multiferroic Ho0.5Nd0.5Fe3(BO3)4 single crystal using X-ray magnetic circular dichroism / M. S. Platunov [et al.] // ArXiv. - 2018. - Ст. 1804.07057. - Cited References: 28. - The study was supported in part by the grants of the Russian Foundation for Basic Research (project nos. 16-32-60049, 17-02-00826) and the Foundation for Assistance to Small Innovative Enterprises (FASIE, UMNIK program). The authors thank the BM01A/ID28/ID12 beamlines staffs for help during the experiment and also gratefully acknowledge the beamtime provision (proposal HC-1804) by the ESRF.
Рубрики:
Antiferromagnetics
   Magnetic anisotropy
   Magnetoelectric effects, multiferroics
Аннотация: Using element-specific X-ray magnetic circular dichroism (XMCD) technique we have studied different magnetic sublattices in a multiferroic Ho0.5Nd0.5Fe3(BO3)4 single crystal. The XMCD measurements at the L2,3-edges of Ho and Nd, and at the Fe \emph{K}-edge have been performed at T=2K under a magnetic field up to 17 T applied along the trigonal c-axis as well as in the basal ab-plane. All three magnetic sublattices are shown to undergo a spin-reorientation transition under magnetic field applied along the c-axis. On the contrary, when magnetic field is applied in the ab-plane only the holmium atoms exhibit a magnetization jump. Thus, the element-specific magnetization curves revealed the Ho sublattice to be much stronger coupled to the Fe one than the Nd sublattice. The results demonstrate that the Ho3+ subsystem plays even more dominant role in magnetic behavior of Ho0.5Nd0.5Fe3(BO3)4 crystal than in pure HoFe3(BO3)4 crystal.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50, bld. 38, 660036 Krasnoyarsk, Russia
ESRF-The European Synchrotron, 71 Avenue des Martyrs CS40220, F-38043 Grenoble Cedex 9, France
P.N. Lebedev Physical Institute of RAS, 119991 Moscow, Russia

Доп.точки доступа:
Platunov, M. S.; Платунов, Михаил Сергеевич; Kazak, N. V.; Казак, Наталья Валерьевна; Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Wilhelm, F.; Hen, A.; Diadkin, V.; Dovgaliuk, I.; Bosak, A.; Temerov, V. L.; Темеров, Владислав Леонидович; Gudim, I. A.; Гудим, Ирина Анатольевна; Knyazev, Yu. V.; Князев, Юрий Владимирович; Gavrilkin, S. Yu.; Rogalev, A.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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GEKHT, R. S.
ON MAGNETIC STATES IN STRONGLY FRUSTRATED 2-DIMENSIONAL ANTIFERROMAGNETICS / R. S. GEKHT, V. V. GRISHIN // Fiz. Tverd. Tela. - 1992. - Vol. 34, Is. 11. - P. 3557-3559. - Cited References: 5 . - ISSN 0367-3294

РУБ Physics, Condensed Matter
Рубрики:
PHASE-TRANSITIONS
LATTICE

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Держатели документа:
LV KIRENSKII INST PHYS,KRASNOYARSK,RUSSIA
ИФ СО РАН

Доп.точки доступа:
GRISHIN, V. V.
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APLESNIN, S. S.
NONPERIODIC STRUCTURES WITH A MULTICOMPONENT ORDER-PARAMETER IN FRUSTRATED ANISOTROPIC HEXAGONAL ANTIFERROMAGNETICS / S. S. APLESNIN // Fiz. Tverd. Tela. - 1992. - Vol. 34, Is. 12. - P. 3691-3694. - Cited References: 7 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

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Modulated magnetic structure in quasi-one-dimensional clinopyroxene NaFeGe2O6 / T. V. Drokina [et al.] // J. Exp. Theor. Phys. - 2011. - Vol. 112, Is. 1. - P. 121-126, DOI 10.1134/S1063776110061093. - Cited References: 18 . - ISSN 1063-7761

РУБ Physics, Multidisciplinary

Кл.слова (ненормированные):
Antiferromagnetics -- Clinopyroxenes -- Field dependence -- Helical modulation -- Incommensurate magnetic structures -- Magnetic phase transitions -- Monoclinic compound -- Order-disorder -- Orientation phase transitions -- Quasi-one-dimensional -- Temperature behavior -- Temperature dependence -- Wave vector -- Antiferromagnetism -- Magnetic devices -- Magnetic structure -- Phase transitions -- Crystallography
Аннотация: The magnetic structure of the NaFeGe2O6 monoclinic compound has been experimentally investigated using the elastic scattering of neutrons. At a temperature of 1.6 K, an incommensurate magnetic structure has been observed in the form of an antiferromagnetic helix formed by a pairs of the spins of the Fe3+ ions with helical modulation in the ac plane of the crystal lattice. The wave vector of the magnetic structure has been determined and its temperature behavior has been studied. The analysis of the temperature dependences of the specific heat and susceptibility, as well as the isotherms of the field dependence of the magnetization, has revealed the existence of not only the order-disorder magnetic phase transition at the point T (N) = 13 K, but also an additional magnetic phase transition at the point T (c) = 11.5 K, which is assumingly an orientation phase transition.

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Держатели документа:
[Drokina, T. V.
Petrakovskii, G. A.
Balaev, A. D.
Kartashev, A. V.
Ivanov, D. A.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Drokina, T. V.
Petrakovskii, G. A.] Siberian Fed Univ, Krasnoyarsk 660074, Russia
[Keller, L.
Schefer, J.] Swiss Fed Inst Technol, Neutron Scattering Lab, CH-5232 Villigen, Switzerland
[Keller, L.
Schefer, J.] Paul Scherrer Inst, CH-5232 Villigen, Switzerland
ИФ СО РАН
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660074, Russian Federation
Laboratory for Neutron Scattering, ETH Zurich and Paul Scherrer Institut, Villigen PSI CH-5232, Switzerland

Доп.точки доступа:
Drokina, T. V.; Дрокина, Тамара Васильевна; Petrakovskii, G. A.; Петраковский, Герман Антонович; Keller, L.; Schefer, J.; Balaev, A. D.; Балаев, Александр Дмитриевич; Kartashev, A. V.; Карташев, Андрей Васильевич; Ivanov, D. A.
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10.

APLESNIN, S. S.
MAGNETIC-PROPERTIES OF ANTIFERROMAGNETICS WITH FLUCTUATIONALLY INTERACTING PLANES / S. S. APLESNIN // Fiz. Tverd. Tela. - 1993. - Vol. 35, Is. 8. - P. 2105-2109. - Cited References: 5 . - ISSN 0367-3294

РУБ Physics, Condensed Matter

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