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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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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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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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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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    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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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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Inclined magnetic structures and magnetic phase diagrams for the Pb2Fe2−xMnxGe2O9 (x = 0.16) single crystal / A. I. Pankrats, A. D. Balaev, S. A. Skorobogatov [et al.] // J. Magn. Magn. Mater. - 2022. - Vol. 563. - Ст. 170021, DOI 10.1016/j.jmmm.2022.170021. - Cited References: 24. - This study was supported by the Russian Foundation for Basic Research, the Government of the Krasnoyarsk Territory, and the Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project no. 20-42-2 40006 “Synthesis and Study of Pb 2+ and Bi 3+ -Containing Oxide Single Crystals with Partial Substitution in One of the Subsystems: Magnetic Structures and Magnetodielectric Effect”. The SEM and EDS studies were carried out at the Joint Scientific Center of the Siberian Federal University within the state assignment (#FSRZ-2020-0011) of the Ministry of Science and Higher Education of the Russian Federation . - ISSN 0304-8853
Кл.слова (ненормированные):
Antiferromagnetics -- Antiferromagnets -- Applied magnetic fields -- Field change -- Magnetic phase diagrams -- Specific heat measurement -- Spins reorientation transition -- Structures phase -- Synthesised
Аннотация: Single crystals of the Pb2Fe2?xMnxGe2O9 (x = 0.16) antiferromagnet have been grown. Using the specific heat measurements, a Neel temperature of TN = (42.0 ± 0.5) K for the synthesized crystals has been found. It has been shown using the magnetic measurements that, due to the competition between the magnetoanisotropic contributions of the iron and manganese subsystems in the crystals, near a temperature of Tc = 22 K, a spontaneous spin-reorientation transition occurs, the temperature of which in an applied magnetic field changes with the field value and orientation relative to the rhombic axes of the crystal. Based on the analysis of the temperature and field dependences of the magnetization obtained at different orientations of the magnetic field, it has been established that, below Tc, an inclined magnetic structure is formed in the crystal. The antiferromagnetic vector of the inclined structure rotates smoothly in the rhombic bc plane with increasing temperature from a direction close to the b axis at T = 4.2 K and tends to the rhombic c axis at T = Tc. The rotation of the antiferromagnetic vector occurs also at fixed temperatures T < Tc with increasing magnetic field. In the temperature range of Tc < T < TN, the antiferromagnetic vector is oriented along the rhombic c axis. Magnetic phase diagrams of states have been built for different magnetic field orientations relative to the rhombic axes of the crystal. The richest phase diagram is shown to correspond to the orientation H||c and contains, along with the above-listed states, one more inclined phase, in which the antiferromagnetic vector rotates toward the rhombic a axis direction with a change in temperature or magnetic field.

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Держатели документа:
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Petersburg Nuclear Physics Institute, National Research Center “Kurchatov Institute”, Gatchina, 188300, Russian Federation

Доп.точки доступа:
Pankrats, A. I.; Панкрац, Анатолий Иванович; Balaev, A. D.; Балаев, Александр Дмитриевич; Skorobogatov, S. A.; Скоробогатов, Станислав Алексеевич; Krasikov, A. A.; Красиков, Александр Александрович; Kolkov, M. I.; Колков, Максим Игоревич; Zharkov, S. M.; Жарков, Сергей Михайлович; Zeer, G. M.; Pavlovskii, M. S.; Павловский, Максим Сергеевич; Balaev, D. A.; Балаев, Дмитрий Александрович
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Effect of magnetic frustrations on magnetism of the Fe3BO5 and Co3BO5 ludwigites / Y. V. Knyazev [et al.] // J. Magn. Magn. Mater. - 2019. - Vol. 474. - P. 493-500, DOI 10.1016/j.jmmm.2018.10.126. - Cited References: 33. - The Russian Foundation for Basic Research, Russia (project no. 17-02-00826-a ). S.G.O. thanks the Russian Academy of Science , Russia (project no. 0356-2017-0030 ) for financial support. J.B. and A.A. acknowledge the financial support of the Spanish MINECO-MAT2017-83468R project, Aragonese E-12 17R RASMIA (co-funded by Fondo Social Europeo), and the European Union (FEDER (ES)). . - ISSN 0304-8853
Кл.слова (ненормированные):
Antiferromagnetics -- Superexchange interactions -- Frustrations
Аннотация: The magnetic structures of Fe3BO5 and Co3BO5 ludwigites have been studied experimentally by magnetic measurements and theoretically by the combination of the group theoretical analysis and semi empiric calculations of the superexchange interactions. The different collinear spin configurations in the triads 3-1-3 and 4-2-4 including ferromagnetic, antiferromagnetic and dimer have been considered. For Fe3BO5 the antiferromagnetic state with zero magnetic moment per unit cell, showing the lowest energy, results to be the most probable magnetic ground state. The unusual magnetic structure comprising two virtually independent orthogonal subsystems is formed to avoid heavy frustrations of superexchange interactions between the 3-1-3 and 4-2-4 spin ladders. In Co3BO5 the magnetic frustrations present for the Co3+ high-spin state are quenched for a Co3+ low spin state resulting in the ferrimagnetic long-range order. The obtained results are discussed in comparison with experimental magnetic data.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian State University of Science and Technologies, Krasnoyarsk, 660014, Russian Federation
Instituto de Ciencia de Materiales de Aragon, CSIC-Universidad de Zaragoza and Departamento de Fisica de la Materia Condensada, Zaragoza, 50009, Spain
Servicio de Medidas Fisicas, Universidad de Zaragoza, Pedro Cerbuna 12, Zaragoza, 50009, Spain

Доп.точки доступа:
Knyazev, Yu. V.; Князев, Юрий Владимирович; Kazak, N. V.; Казак, Наталья Валерьевна; Nazarenko, I. I.; Назаренко, Илья Иванович; Sofronova, S. N.; Софронова, Светлана Николаевна; Rostovtsev, N. D.; Bartolome, J.; Arauzo, A.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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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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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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