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Fourfold in-plane magnetic anisotropy in epitaxial Fe(110)/Cu(001) and Fe(110)/Ni(001) bilayers / Myagkov V.G., Bykova L.E. and Lee L.A. // Байкальская международная конференция ”Магнитные материалы: Новые технологии ”, Россия, Иркутск, 2008, С.129

Доп.точки доступа:
Myagkov, V. G.; Мягков, Виктор Григорьевич; Bykova, L. E.; Быкова, Людмила Евгеньевна; Lee, L. A.; Ли, Людмила Алексеевна
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Magnetic anisotropy and ferromagnetic resonance in inhomogeneous demagnetizing fields near edges of thin magnetic films / P. N. Solovev, B. A. Belyaev, N. M. Boev [et al.] // J. Phys. Condens. Matter. - 2024. - Vol. 36, Is. 19. - Ст. 195803, DOI 10.1088/1361-648X/ad258c. - Cited References: 38 . - ISSN 0953-8984. - ISSN 1361-648X
Кл.слова (ненормированные):
edge domain -- demagnetizing fields -- demagnetizing fields -- film edges -- magnetic anisotropy -- magnetization dynamics
Аннотация: Using local ferromagnetic resonance spectroscopy, we have studied the magnetic properties near edges of thin tangentially magnetized permalloy films, in which a well-defined uniaxial magnetic anisotropy was induced perpendicular to one of the edges. In the experiment, two samples with thicknesses of 90 and 300 nm and with slightly different compositions were examined. To explain the magnetization dynamics near edges, we propose a simple yet effective model of a film in the form of a rectangular prism, which yields the modified Kittel formula for the resonance frequency. In this formula, the locally averaged distance-dependent demagnetizing field that emerges near the edges is included as an additional uniaxial anisotropy term. The measurements reveal that at a certain distance from the edge, the resulting (apparent) anisotropy, determined from the angular dependencies of the resonance field, almost vanishes. Moreover, its easy axis reorients to become parallel to the edge. The model predictions agree well with these results, proving that the main resonance mode behavior near the film edges can be accurately described by introducing additional effective uniaxial anisotropy, provided the measuring area is relatively large. However, for the thick (300 nm) sample, additional precession modes are also observed. These modes distort the angular dependence of the main mode, thus demonstrating the limitations of the model.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 50/38 Akademgorodok, 660036 Krasnoyarsk, Russia
Siberian Federal University, 79 Svobodny pr., 660041 Krasnoyarsk, Russia

Доп.точки доступа:
Solovev, P. N.; Соловьев, Платон Николаевич; Belyaev, B. A.; Беляев, Борис Афанасьевич; Boev, N. M.; Боев, Никита Михайлович; Skomorokhov, G. V.; Скоморохов, Георгий Витальевич; Izotov, A. V.; Изотов, Андрей Викторович
}
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Martynov, A. S.
Quantum SU(3)-ferrimagnet on triangular lattice / A. S. Martynov, D. M. Dzebisashvili // J. Magn. Magn. Mater. - 2024. - Vol. 594. - Ст. 171906, DOI 10.1016/j.jmmm.2024.171906. - Cited References: 48. - The authors thanks professor V.V. Val’kov for original idea of this article, for his continuous interest and enormous contribution to this work . - ISSN 0304-8853. - ISSN 1873-4766
Кл.слова (ненормированные):
Quantum SU(3)-ferrimagnet -- Single-ion anisotropy -- Quadrupole ordering -- Triangular lattice
Аннотация: Manifestations of quantum effects in the macroscopic properties of frustrated magnets keep attracting considerable interest. We have formulated and studied a simple model of a three-sublattice mixed-spin (S=1,1/2,1/2) SU(3)-ferrimagnet on triangular lattice in which the strong quantum fluctuations are developed due to combined effect of frustrated exchange bonds, reduced dimensionality and a single-ion easy-plane anisotropy in the spin-1 sublattice. To account correctly for the SU(3) algebra, the Hubbard operators representation of generators is used. Dependencies of the magnetic moments R and RL (for spin-1/2 and spin-1 sublattices respectively), the total magnetic moment M, as well as the quadrupole moment, on the anisotropy parameter D are calculated at zero temperature and different ratios I/J of exchange integrals from different sublattices. It is established that for I/J≪1 the critical value Dc, at which the system enters the quadrupole antiferromagnetic phase, can be much smaller than both I and J. Besides, with an increase in D from zero to Dc the total moment M can change its direction several times via taking zero value. Classification of four branches of the spin-wave excitation spectrum of the SU(3)-ferrimagnet is carried out and modification of the spectrum with change in the single-ion anisotropy is analyzed.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036, Krasnoyarsk, Russia

Доп.точки доступа:
Dzebisashvili, D. M.; Дзебисашвили, Дмитрий Михайлович; Мартынов, Александр Сергеевич
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Ferromagnetic resonance and magnetic anisotropy of 3d-metal wires with composition gradients / E. A. Denisova, L. A. Chekanova, S. V. Komogortsev [et al.] // Bull. Russ. Acad. Sci.: Phys. - 2024. - Vol. 88, Is. 4. - P. 531-535, DOI 10.1134/S1062873823706244. - Cited References: 13 . - ISSN 1062-8738. - ISSN 1934-9432
Кл.слова (ненормированные):
wires with gradients of composition -- electroless deposition -- ferromagnetic resonance -- magnetic anisotropy
Аннотация: Results are presented from investigating the ferromagnetic resonance spectra of arrays of Co‒Ni and Co‒Fe‒Ni wires with different composition gradients, deposited into polycarbonate track-etched membranes. The effect interfaces and concentration gradients have on the effective fields of the investigated wires is examined. An anomalous angular dependence of the fields of ferromagnetic resonance is observed for the wire arrays at a pore density of ~18% in the membrane.

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Держатели документа:
Kirensky Institute of Physics, Federal Reserch Center “Krasnoyarsk Science Centre,” Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia
Siberian Federal University, 660041, Krasnoyarsk, Russia
Rechetnev Siberian State University of Science and Technology, 660049, Krasnoyarsk, Russia
Federal Reserch Center “Krasnoyarsk Science Center,” Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia

Доп.точки доступа:
Denisova, E. A.; Денисова, Елена Александровна; Chekanova, L. A.; Чеканова, Лидия Александровна; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Vazhenina, I. G.; Важенина, Ирина Георгиевна; Nemtsev, I. V.; Немцев, Иван Васильевич; Li, O. A.
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Light-driven anisotropy of 2D metal-organic framework single crystal for repeatable optical modulation / Yu. A. Kenzhebayeva, N. K. Kulachenkov, S. S. Rzhevskiy [et al.] // Commun. Mater. - 2024. - Vol. 5, Is. 1. - Ст. 48, DOI 10.1038/s43246-024-00485-5. - Cited References: 84. - V.A.M. acknowledges the financial support from the Russian Science foundation (Grant Numb. 22-72-10027 “Flexible hybrid materials as active layer in memory devices”, work on pump-probe and nonlinear optical spectroscopuy) and the Priority 2030 Federal Academic Leadership Program. Y.A.K. acknowledges the financial support from the Russian Science foundation (Grant Numb. 19-79-10259 for transmission optical spectroscopy with heating and laser mode). S.S. acknowledges the financial support by the Government of the Russian Federation through the ITMO Fellowship and Professorship Program. P.A. acknowledge AFM Centre of ITMO University for help with the MOF mechanical characterization. Temperature-dependent SCXRD analysis was carried out at XRD facilities of NIIC operating with the support from the Ministry of Science and Higher Education of the Russian Science Federation (project 121031700321-3). The authors would like to thank Mirko Schoenitz and Irina Molodetsky for discussion of crystallographic data. A.K. acknowledges the financial support from RFBR and DFG (Grant Numb. 21-52-12018 for Raman measurements). Raman experiments have been performed in the Center of Common Use of the Krasnoyarsk Scientific Center SB RAS . - ISSN 2662-4443
Аннотация: Structural transformations of metal-organic frameworks (MOFs) go through a complex energy landscape with multiple intermediate states. Although the transformations allow controlling the functional properties of the MOFs, an imbalance between MOF flexibility and rigidity sets a fundamental barrier to achieving fast and multiple transformations. Here, we study the stimuli-responsive structural transformation in a 2D MOF assembled from paddle-wheel secondary building units joined by a semi-flexible organic ligand with 1,2,4-triazole and carboxylate groups with a rigid adamantane cage between them. The structure results in a distinctive combination of MOF flexibility and rigidity, thus, facilitating a continuous transformation driven by laser light. We reveal the laser-induced anisotropic thermal expansion nature of such transformation, initiating optical changes of the 2D MOF. The latter is utilized for fast and highly repeatable optical modulation of over 10,000 cycles. The endurance of such a 2D MOF-based optical modulator during 1 year of storage at ambient conditions paves the way to design tunable and robust MOFs for diverse applications.

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Держатели документа:
School of Physics and Engineering, ITMO University, St Petersburg, 197101, Russia
Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, 620137, Russia
Center for Advancing Electronics, Technische Universitat Dresden, 01069, Dresden, Germany
Otto H. York Department of Chemical and Materials Engineering, New Jersey Institute of Technology, University Heights, Newark, NJ, 07102, USA
South Ural State University, Chelyabinsk, 454080, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk, 630090, Russia
Institut Jean Lamour, Universit de Lorraine, UMR CNRS 7198, 54011, Nancy, France

Доп.точки доступа:
Kenzhebayeva, Yu. A.; Kulachenkov, N. K.; Rzhevskiy, S. S.; Slepukhin, P. A.; Shilovskikh, V. V.; Efimova, A.; Alekseevskiy, P.; Gor, G. Y.; Emelianova, A.; Shipilovskikh, S.; Yushina, I. D.; Krylov, A. S.; Крылов, Александр Сергеевич; Pavlov, D. I.; Fedin, V. P.; Potapov, A. S.; Milichko, V. A.
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Ignatchenko, V. A.
High-frequency susceptibility of the ferromagnetic resonance in thin films with random one- and two-dimensional inhomogeneities in the magnetic anisotropy / V. A. Ignatchenko, D. S. Tsikalov, D. S. Polukhin // J. Exp. Theor. Phys. - 2023. - Vol. 136, Is. 1. - P. 39-45, DOI 10.1134/S1063776123010041. - Cited References: 26. - This work was supported in part by the Russian Foundation for Basic Research, by the Government of the Krasnoyarsk region, and by the Krasnoyarsk Regional Science Foundation (project no. 20-42-240010) . - ISSN 1063-7761. - ISSN 1090-6509
Аннотация: The effect of random one- (1D) and two-dimensional (2D) inhomogeneities of the magnetic anisotropy on the shape and width of ferromagnetic resonance line in a thin film has been studied in the standard and new self-consistent approximations. It has been shown that resonance peaks in the case of 2D inhomogeneities are much narrower than those for 1D ones. Peaks are asymmetric in both the 1D and 2D cases, but asymmetry is larger in the latter case. As the correlation wavenumber of inhomogeneities kc increases, the width of a resonance line decreases and its amplitude increases. The amplitude of the FMR peak for 2D inhomogeneities increases much faster than that for 1D inhomogeneities. At the critical dimensionless parameter kcd/π ~ 1, where d is the thickness of the film, the width of the resonance line has an inflection point and the asymmetry of this line and the shift of the ferromagnetic resonance peak are maximal. It has been shown that the new self-consistent approximation reproduces the shape of the resonance line much better than the standard self-consistent approximation.

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Публикация на русском языке Игнатченко, Вальтер Алексеевич. Высокочастотная восприимчивость ферромагнитного резонанса в тонких пленках со случайными 1D- и 2D-неоднородностями величины магнитной анизотропии [Текст] / В. А. Игнатченко, Д. С. Цикалов, Д. С. Полухин // Журн. эксперим. и теор. физ. - 2023. - Т. 163 Вып. 1. - С. 50-57

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036, Krasnoyarsk, Russia

Доп.точки доступа:
Tsikalov, D. S.; Цикалов, Денис Сергеевич; Polukhin, D. S.; Полухин, Дмитрий Сергеевич; Игнатченко, Вальтер Алексеевич; Eurasian Symposium “Trends in Magnetism”(8 ; 22-26 August 2022 ; Kazan, Russia)
}
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Phases, microstructure and magnetic properties in a severely deformed Cr-Ni–Al alloy / L. I. Kveglis, D. E. Yerbolatuly, F. M. Noskov [et al.] // J. Supercond. Nov. Magn. - 2023. - Vol. 36, Is. 4. - P. 1249-1255, DOI 10.1007/s10948-023-06567-8. - Cited References: 22. - The authors express their gratitude to Nurgamit Kantay (East-Kazakhstan University named after S. Amanzholov) for his help in conducting the experiment . - ISSN 1557-1939. - ISSN 1557-1947
Кл.слова (ненормированные):
Nickel–chromium alloy -- Coercive force -- Magnetic anisotropy -- Super-plasticity -- Intermetallic phases
Аннотация: The phases, microstructure, and magnetic properties in a severely deformed Cr-Ni–Al alloy have been studied. The eutectic microstructure observed in localized regions of the alloy can be interpreted as a result from the super-Arrhenius relaxation of the alloy. According to X-ray diffraction and magnetometry, the nanosized nickel inclusions in the matrix of the chromium-nickel γ-solid solution are formed. It is shown that, after severe (superplastic) deformation, a unidirectional magnetic anisotropy is induced, which may be associated with the antiferromagnetic coupling between the CrNi2 matrix and the nickel inclusions.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, Russia
East Kazakhstan University named after S. Amanzholov, Ust-Kamenogorsk, Kazakhstan
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia

Доп.точки доступа:
Kveglis, Ludmila I.; Yerbolatuly, Dosym E.; Noskov, Fedor M.; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Volochaev, M. N.; Волочаев, Михаил Николаевич
}
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Magnetic anisotropy of nanostructured Fe-Ni-C coating produced by electroless deposition / E. A. Denisova, L. A. Chekanova, S. V. Komogortsev [et al.] // Phys. Solid State. - 2023. - Vol. 65, Is. 6. - P. 851-855, DOI 10.21883/PSS.2023.06.56090.14H. - Cited References: 20. - The study was done with financial support from the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory and the Krasnoyarsk Regional Fund of Science within scientific project No. 20-43-240003 . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
3d-metal alloys -- the approach to saturation magnetization law -- coercivity
Аннотация: The structural and magnetic properties of nanostructured Fe100–xNix-C (0 ˂ x ˂ 100) coatings produced by electroless plating with different carbohydrates as reducing agents have been investigated. The phase-structural state of the films was studied by diffraction and electron microscopy. The Ni concentration ranges of FCC and BCC phases existence in electroless deposited films were determined. The surface morphology, saturation magnetization, local magnetic anisotropy field and coercivities of films are dependent on the iron content and type of reducing agent. The correlation between coercivity Hc and the anisotropy field of the magnetic stochastic domain which were established by correlation magnetometry suggests that the magnitude of Hc is mainly determined by this anisotropy.

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Публикация на русском языке Магнитная анизотропия наноструктурированных покрытий Fe-Ni-C, полученных методом химического осаждения [Текст] / Е. А. Денисова, Л. А. Чеканова, C. В. Комогорцев [и др.]. - 6 с. // Физ. твердого тела. - 2023. - Т. 65 Вып. 6. - С. 888-893

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
Siberian Federal University, Krasnoyarsk, Russia
Siberian State University of Science and Technology, Krasnoyarsk, Russia
Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russia

Доп.точки доступа:
Denisova, E. A.; Денисова, Елена Александровна; Chekanova, L. A.; Чеканова, Лидия Александровна; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Li, O. A; Sukhachev, A. L.; Сухачев, Александр Леонидович; Velikanov, D. A.; Великанов, Дмитрий Анатольевич; Nemtsev, I. V.; Немцев, Иван Васильевич; Nanophysics and Nanoelectronics, International Symposium(27 ; 13-16 March 2023 ; Nizhny Novgorod, Russia)
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    Influence of a thin V2O3 spacer on interlayer interactions in Fe-Ni/V2O3/FeNi film structures / G. S. Patrin, A. V. Kobyakov, V. I. Yushkov [et al.] // Processes. - 2023. - Vol. 11, Is. 7. - Ст. 2084, DOI 10.3390/pr11072084. - Cited References: 25. - The research was conducted according to the state assignment of the Ministry of Science and Higher Education of the Russian Federation and the Federal State Autonomous Educational Institution of Higher Education Siberian Federal University (No. FSRZ-2023-0008) . - ISSN 2227-9717
   Перевод заглавия: Влияние тонкой прослойки V2O3 на межслоевое взаимодействие в пленочной структуре FeNi/V2O3/FeNi
Кл.слова (ненормированные):
ferromagnetic -- vanadium oxide -- interface anisotropy
Аннотация: In this paper, we explore the suggestions of the results of experimental studies on low-dimensional layered systems in FeNi/V2O3/FeNi film structures. The multifunctional material V2O3 is used as an interlayer between the magnetically active FeNi layers. The films were obtained by ultrahigh vacuum magnetron sputtering on a glass substrate with a base size of 10−10 Torr. It has been found that for V2O3 films, the decrease in the metal–semiconductor transition temperature increases significantly. Magnetic characteristics were studied on the MPMS-XL SQUID magnetometer. The exchange effect occurs both in the region where the oxide has a magnetic order and in the paramagnetic region. The latter is due to the effect of the magnetic panel in the oxide package. The phenomenon of oscillation of the exchange field occurs depending on the phenomenon of intermediate observation observed experimentally.

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Держатели документа:
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, 79 Svobodny Pr., 660041 Krasnoyarsk, Russia
Kirensky Institute of Physics, Federal Research Center KSC Siberian Branch Russian Academy of Sciences, Akademgorodok 50, Building 38, 660036 Krasnoyarsk, Russia

Доп.точки доступа:
Patrin, G. S.; Патрин, Геннадий Семёнович; Kobyakov, A. V.; Кобяков, Александр Васильевич; Yushkov, V. I.; Юшков, Василий Иванович; Anisimov, I. O.; Zharkov, S. M.; Жарков, Сергей Михайлович; Semenov, S. V.; Семёнов, Сергей Васильевич; Moiseenko, Evgeniy T.
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10.

Martynov, S. N.
Orbital structure and magnetic phase diagram of the four-sublattice ferromagnet PbMnBO4 / S. N. Martynov // J. Magn. Magn. Mater. - 2023. - Vol. 570. - Ст. 170520, DOI 10.1016/j.jmmm.2023.170520. - Cited References: 20. - The author thanks A.D. Balaev for useful discussions of the magnetic measurements . - ISSN 0304-8853. - ISSN 1873-4766
Кл.слова (ненормированные):
Ferromagnets -- Magnetic anisotropy -- Noncollinear magnetic structures
Аннотация: A role of quadric and quartic single-ion anisotropy (SIA) of Mn3+-ions, dipole–dipole and Dzyaloshinsky–Moriya (DM) interactions for the magnetic ordering of the four-sublattice ferromagnet PbMnBO4 is investigated. A phase diagram of low-lying magnetic phases on the plane of the DM exchange components is obtained for different values of the SIA parameters. An effect of the isotropic interchain exchange on the spin orientation and, as a result, on the SIA energy in different magnetic phases is considered at the comparable values of the interactions. The determinative role of DM exchange for the magnetic anisotropy of PbMnBO4 is discussed.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russia

Доп.точки доступа:
Мартынов, Сергей Николаевич
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11.

Anisotropy and crystallite misalignment in textured superconductors / D. M. Gokhfeld, S. V. Semenov, M. I. Petrov [et al.] // J. Supercond. Nov. Magn. - 2023. - Vol. 36, Is. 1. - P. 59-65, DOI 10.1007/s10948-022-06454-8. - Cited References: 21. - This work was supported by the Russian Foundation for Basic Research and the Government of the Krasnoyarsk Territory, Krasnoyarsk Territorial Foundation for Support of Scientific and R&D Activities, project “Superconducting properties of YBCO incorporated by paramagnetic rare-earth elements” No. 20–42–240008 . - ISSN 1557-1939. - ISSN 1557-1947
Кл.слова (ненормированные):
Critical current -- Anizotropy -- BSCCO -- Texture -- Distribution function -- Magnetization -- Hysteresis loop
Аннотация: A misalignment of anisotropic crystallites causes small values of anisotropy and decreases the critical current density of textured polycrystalline superconductors. To relate the crystallite misalignment and out-plane anisotropy, the magnetic properties of the textured Bi2223 polycrystalline superconductor were investigated. A distribution of orientation angles of crystallites was determined using different data: scanning electron microscopy images and hysteresis magnetization loops when an external magnetic field was applied at different angles with respect to the texturing plane of the sample. It was demonstrated that the standard deviation of the distribution and the magnetic disorder angle of crystallites in textured samples can be determined from the magnetization data in perpendicular directions. These data may be either the irreversible magnetization measured for two different orientations of the sample or the simultaneously measured magnetization projections parallel and perpendicular to the magnetic field.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russia
Siberian Federal University, Krasnoyarsk, 660041, Russia
Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”, Krasnoyarsk, 660036, Russia

Доп.точки доступа:
Gokhfeld, D. M.; Гохфельд, Денис Михайлович; Semenov, S. V.; Семенов, Сергей Васильевич; Petrov, M. I.; Петров, Михаил Иванович; Nemtsev, I. V.; Немцев, Иван Васильевич; Balaev, D. A.; Балаев, Дмитрий Александрович
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12.

    Аверьянов, Евгений Михайлович.
    Молекулярно-оптическая и структурная анизотропия одноосных монодоменных/полидоменных пленок сопряженного полимера F8BT с аксиальной/плоскостной ориентацией макромолекул / Е. М. Аверьянов // Жидк. крист. и их практич. использ. - 2023. - Т. 23, № 1. - С. 68-77 ; Liq. Cryst. Appl., DOI 10.18083/LCAppl.2023.1.68. - Библиогр.: 14 . - ISSN 1991-3966. - ISSN 2499-9644
   Перевод заглавия: Molecular-optical and structural anisotropy of uniaxial single-domain/ polydomain films of conjugated polymer F8BT with axial/planar orientation of macromolecules
Кл.слова (ненормированные):
тонкие полимерные пленки -- двумерные поликристаллы -- сопряженные полимеры -- F8BT -- ориентационный порядок -- оптическая и спектральная анизотропия -- thin polymer films -- two-dimensional polycrystals -- conjugated polymers -- F8BT -- orientation order -- optical and spectral anisotropy
Аннотация: На практике используются одноосные полимерные пленки двух типов: монодоменные пленки на ориентирующих подложках с аксиальной ориентацией макромолекул относительно оптической оси пленки n, параллельной плоскости подложки (тип ОА); полидоменные пленки на изотропных подложках с плоскостной ориентацией макромолекул и оптической осью n, нормальной к подложке (тип ОP). Молекулярно-оптическая анизотропия пленки определяется средней по ансамблю анизотропией δγ = γ|| – γ⊥ компонент поляризуемости γj мономерных звеньев полимерных цепей для поляризаций световой волны вдоль (j = ||) и нормально (j = ⊥) оси n. Структурную анизотропию пленки описывают параметры ориентационного порядка U дипольных моментов m электронных (колебательных) переходов в мономерных звеньях макромолекул относительно оси n. Для пленок одного полимера значения параметров Rδ(λ) = δγА/δγP и RU = UA/UP характеризует степень близости полидоменной пленки к идеальному двумерному поликристаллу. В данной работе исследованы зависимость Rδ(λ) от длины световой волны λ в видимой области прозрачности и параметры порядка UA(P) для дипольного момента длинноволнового электронного перехода в монодоменных и полидоменных пленках сопряженного полимера F8BT. Значения Rδ(λ) получены из показателей преломления пленок nj(λ) с учетом компонент fj(λ) = 1 + Lj[nj2(λ) – 1] тензора локального поля. Компоненты Lj тензора Лорентца определены с использованием зависимостей nj(λ). Значения Rδ(λ) согласуются с Rδ = –2 для двумерного поликристалла, состоящего из одноосных кристаллитов. Параметры UA(P) определены с использованием фоновых величин nbj и максимальных значений kjmax компонент комплексного показателя преломления Nj(λ) = nj(λ) + ikj(λ) пленок в области длинноволновой полосы электронного поглощения при учете фоновых значений fbj = 1 + Lj(nbj2 – 1). Экспериментальное значение RU отличается от RU = –2 для двумерного поликристалла, что показывает чувствительность параметра UP к ориентационному беспорядку мономерных звеньев макромолекул в междоменных областях полидоменных пленок.
Two types of uniaxial polymer films are used in practice. The first type is singledomain film on orienting substrate with axial orientation of macromolecules with respect to the optical axis of the film n which is parallel to the substrate plane (type ОА). The second type is polydomain film on isotropic substrate with in-plane orientation of macromolecules and the optical axis of the film n which is perpendicular to the substrate plane (type ОP). The molecular-optical anisotropy of a film is defined by the ensemble-averaged anisotropy δγ = γ|| – γ⊥ of the components γj of the polarizability of the monomer units of a polymer for the light-wave polarizations along (j = ||) and across (j = ⊥) the optical axis n. The structural anisotropy of the film is described by the orientation order parameters U of the dipole moments m of the electronic (oscillatory) transitions in monomer units of macromolecule with respect to axis n. For films of the same polymer, the values of Rδ(λ) = δγА/δγP and RU = UA/UP characterize the closeness degree of the polydomain film to the ideal twodimensional polycrystal. In this work, the dependence Rδ(λ) on the light-wavelength λ in the visible range and the order parameters UA(P) for the dipole moment of the long-wavelength electronic transition in single-domain and polydomain films of the conjugated polymer F8BT were studied. The values Rδ(λ) were determined from the refractive indices nj(λ) of the films with the local-field tensor components fj(λ) = 1 + Lj[nj2(λ) – 1]. The Lorentz-tensor components Lj were obtained using the dependences nj(λ). The values Rδ(λ) are in agreement with Rδ = –2 for two-dimensional polycrystal consisted of the uniaxial crystallites. The parameters UA(P) were determined with the use of the background values nbj and maximal values kjmax of the components of the complex refractive indices Nj(λ) = nj(λ) + ikj(λ) of the films in the region of their long-wavelength electronic absorption band, taking into account the background values fbj = 1 + Lj(nbj2 – 1). The experimental value RU differs from RU = –2 for two-dimensional polycrystal. This difference reveals the sensitivity of the parameter UP to the orientation disorder of the monomer units of macromolecules in interdomain regions of polydomain films.

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Институт физики им. Л. В. Киренского, ФИЦ КНЦ СО РАН, Красноярск, Россия

Доп.точки доступа:
Aver'yanov, E. M.

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13.

Solid-state synthesis, magnetic and structural properties of epitaxial D03-Fe3Rh(001) thin films / V. G. Myagkov, L. E. Bykova, V. S. Zhigalov [и др.] // Intermetallics. - 2023. - Vol. 157. - Ст. 107871, DOI 10.1016/j.intermet.2023.107871. - Cited References: 27. - The authors are grateful to L.A. Solovyov for carrying out the XRD φ-scan experiments and I.V. Nemtsev for the measurements of the sample composition. The work is partially based upon the experiments performed at Krasnoyarsk Regional Center of Research Equipment of Federal Research Center « Krasnoyarsk Science Center SB RAS». This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors . - ISSN 0966-9795. - ISSN 1879-0216
Кл.слова (ненормированные):
Thin films -- Solid-state synthesis -- FeRh alloys -- D0 structure -- Magnetic properties -- Magnetic anisotropy
Аннотация: Here we first report on the formation of epitaxial D03-Fe3Rh(001) films grown during solid-state reaction in Rh/Fe(001) bilayers on MgO(001) substrates. Samples of the Fe68Rh32 composition above 400 °C showed the formation of a new ordered phase, in addition to the ordered B2–FeRh phase (space group Pm-3m, lattice constant a = 0.2993 nm), which becomes the dominant phase in Fe76Rh24 samples. These results and the results of the asymmetrical XRD φ-scan prove that the new ordered phase is the ordered D03-Fe3Rh(001) phase (space group Fm-3m, lattice constant a = 0.5888 nm), forming a cube-on-cube orientation relationship with respect to the MgO(001) substrate. The D03-Fe3Rh sample is a soft magnetic material with high saturation magnetization.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, 79 Svobodny pr., Krasnoyarsk, 660041, Russian Federation
Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Akademgorodok 50/24, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Myagkov, V. G.; Мягков, Виктор Григорьевич; Bykova, L. E.; Быкова, Людмила Евгеньевна; Zhigalov, V. S.; Жигалов, Виктор Степанович; Matsynin, A. A.; Мацынин, Алексей Александрович; Zharkov, S. M.; Жарков, Сергей Михайлович; Ivanenko, A. A.; Иваненко, Александр Анатольевич; Bondarenko, G. N.; Velikanov, D. A.; Великанов, Дмитрий Анатольевич
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14.

Magneto-optical ellipsometry of thin max films with optical uniaxial anisotropy / O. A. Maximova, S. A. Lyashchenko, I. A. Yakovlev [et al.] // Book of abstacts of Samarkand International Symposium on Magnetism (SISM-2023) / int. adv. com. S. G. Ovchinnikov [et al.]. - 2023. - Ст. 3PO-L5-11. - P. 173. - Cited References: 1. - РНФ № 21-12-00226 . - ISBN 978-5-00202-320-2

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L.V. Kirensky Institute of Physics SB RAS
Siberian Federal University

Доп.точки доступа:
Ovchinnikov, S. G. \int. adv. com.\; Овчинников, Сергей Геннадьевич; Maximova, O. A.; Максимова, Ольга Александровна; Lyashchenko, S. A.; Лященко, Сергей Александрович; Yakovlev, I. A.; Яковлев, Иван Александрович; Shevtsov, D. V.; Шевцов, Дмитрий Валентинович; Andryushchenko, T. A.; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Samarkand International Symposium on Magnetism(2023 ; July 2-6 ; Samarkand); Samarkand State University
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15.

Magnetic anisotropy and domain structure of epitaxia Mn5Ge3 thin film on Si(111) substrate / M. V. Rautskii, I. Sobolev, I. A. Yakovlev [et al.] // V International Baltic Conference on Magnetism. IBCM : Book of abstracts. - 2023. - P. 151. - Cited References: 5. - РФН № 21-12-00226 ; Красноярский регион. фонд науки

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS
Siberian Federal University

Доп.точки доступа:
Rautskii, M. V.; Рауцкий, Михаил Владимирович; Sobolev, I.; Yakovlev, I. A.; Яковлев, Иван Александрович; Lukyanenko, A. V.; Лукьяненко, Анна Витальевна; Tarasov, A. S.; Тарасов, Антон Сергеевич; Volkov, N. V.; Волков, Никита Валентинович; International Baltic Conference on Magnetism(5 ; 2023 ; Aug. 20-24 ; Svetlogorsk, Russia); Балтийский федеральный университет им. И. Канта
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16.

Magneto-optical ellipsometry of thin films with optical uniaxial anisotropy / O. A. Maximova, S. A. Lyaschenko, S. N. Varnakov [et al.] // Phys. Met. Metallogr. - 2023. - Vol. 124, Is. 14. - P. 1654-1661, DOI 10.1134/S0031918X23601385. - Cited References: 31. - The research was performed at the Magnetic MAX Materials Laboratory of the Kirensky Institute of Physics SB RAS (created under Megagrant project (agreement no. 075-15-2019-1886) with the financial support of the Russian Science Foundation no. 21-12-00226, http://rscf.ru/project/21-12-00226/ . - ISSN 0031-918X. - ISSN 1555-6190
Кл.слова (ненормированные):
principal refractive indices -- uniaxial anisotropy -- permittivity -- magneto-optical parameter -- ellipsometry
Аннотация: In this paper, we solve the inverse problem of magneto-optical ellipsometry for thin ferromagnetic films with optical uniaxial anisotropy. We work within the framework of the approach we developed earlier analyzing magnetoellipsometric data without using fourth-order M-matrices. We work with ellipsometric relations, in which we take into account the magneto-optical contribution as perturbations, and ellipsometric measurements are carried out on a setup with a simple dipole scheme based on the transverse magneto-optical Kerr effect. We add the magneto-optical response to the expressions known in the literature for the reflection coefficients of anisotropic thin films, which are related to the parameters measured by magneto-optical ellipsometry. As a result, by analyzing the obtained expressions for the reflection coefficients, we obtain information on the total permittivity tensor of a thin film.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 660036, Krasnoyarsk, Russia
Krasnoyarsk Scientific Center, Federal Research Center KSC SB RAS, 660036, Krasnoyarsk, Russia

Доп.точки доступа:
Maximova, O. A.; Максимова, Ольга Александровна; Lyashchenko, S. A.; Лященко, Сергей Александрович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Yakovlev, I. A.; Яковлев, Иван Александрович; Shevtsov, D. V.; Шевцов, Дмитрий Валентинович; Andryushchenko, T. A.; Андрющенко, Татьяна Александровна
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17.

Magneto-optical Ellipsometry of Thin Films with Optical Uniaxial Anisotropy [Text] / O. A. Maximova, S. A. Lyashchenko, S. N. Varnakov [et al.] // International conference "Functional materials" : book of abstracts / ed. V. N. Berzhansky ; org. com. S. G. Ovchinnikov [et al.]. - Simferopol, 2023. - Ст. AP2-8P/4. - P. 122. - Cited References: 2. - РФФИ No. 21-12-00226

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Держатели документа:
Kirensky Institute of Physics, FRC KSC SB RAS
Ioffe Institute, RAS, Saint-Petersburg, Russia

Доп.точки доступа:
Berzhansky, V. N. \ed.\; Бержанский, Владимир Наумович; Ovchinnikov, S. G. \org. com.\; Овчинников, Сергей Геннадьевич; Maximova, O. A.; Максимова, Ольга Александровна; Lyashchenko, S. A.; Лященко, Сергей Александрович; Varnakov, S. N.; Варнаков, Сергей Николаевич; Yakovlev, I. A.; Яковлев, Иван Александрович; Shevtsov, D. V.; Шевцов, Дмитрий Валентинович; Andryushchenko, T. A.; Ovchinnikov, S. G.; "Functional materials", International conference(2023 ; Oct. 2-6 ; Crimea, Foros); Крымский федеральный университет имени В.И. Вернадского
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18.

Ferromagnetic resonance and magnetic anisotropy of 3-d metal rods with gradients of composition / E. A. Denisova, L. A. Chekanova, S. V. Komogortsev [et al.] // V International Baltic Conference on Magnetism. IBCM : Book of abstracts. - 2023. - P. 135

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS
Siberian Federal University

Доп.точки доступа:
Denisova, E. A.; Денисова, Елена Александровна; Chekanova, L. A.; Чеканова, Лидия Александровна; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Vazhenina, I. G. (Vashenina, I.); Важенина, Ирина Георгиевна; Iskhakov, R. S.; Исхаков, Рауф Садыкович; Nemtsev, I. V.; Немцев, Иван Васильевич; International Baltic Conference on Magnetism(5 ; 2023 ; Aug. 20-24 ; Svetlogorsk, Russia); Балтийский федеральный университет им. И. Канта
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19.

    Магнитные свойства и анизотропия магнитокалорического эффекта в тонких пленках MnGe3, выращенных на Si (111) / А. С. Тарасов, М. В. Рауцкий, А. В. Лукьяненко, И. А. Соболев // Магнитные материалы. Новые технологии : тез. докл. IX Байкал. междунар. конф. BICMM-2023 / чл. прогр. ком.: S. S. Aplesnin [et al.] ; чл. орг. ком. R. S. Iskhakov [et al.]. - Иркутск, 2023. - С. 145, DOI 10.26516/978-5-9624-2178-0.2023.1-207. - Библиогр.: 4 . - ISBN 978-5-962402178-0
   Перевод заглавия: Magnetic properties and anisotropy of magnetocaloricc effect in the MnGe3 thin film grown on Si(111)

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Держатели документа:
Институт физики им. Л. В. Киренского СО РАН
Сибирский федеральный университет

Доп.точки доступа:
Аплеснин, Сергей Степанович \чл. прогр. ком.\; Aplesnin, S. S.; Балаев, Дмитрий Александрович \чл. прогр. ком.\; Balaev, D. A.; Овчинников, Сергей Геннадьевич \чл. прогр. ком.\; Ovchinnikov, S. G.; Исхаков, Рауф Садыкович \чл. орг. ком.\; Iskhakov, R. S.; Тарасов, Антон Сергеевич; Tarasov, A. S.; Рауцкий, Михаил Владимирович; Rautskii, M. V.; Лукьяненко, Анна Витальевна; Lukyanenko, A. V.; Соболев, И. А.; Байкальская международная конференция "Магнитные материалы. Новые технологии"(9 ; 2023 ; сент. ; 11-14 ; Байкальск); "Магнитные материалы. Новые технологии", Байкальская международная конференция(9 ; 2023 ; сент. ; 11-14 ; Байкальск); "Magnetic materials. New tecnologies", Baikal International Conference(9 ; 2023 ; Sept. ; 11-14 ; Baikalsk); Иркутский государственный университет
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20.

The manifestation of surface and size effects in the magnetic properties of ε-Fe2O3 nanoparticles. (Brief overview) / D. A. Balaev, A. A. Dubrovskii, Yu. V. Knyazev [et al.] // Phys. Solid State. - 2023. - Vol. 65, Is. 6. - P. 938-946, DOI 10.21883/PSS.2023.06.56105.12H. - Cited References: 66 . - ISSN 1063-7834. - ISSN 1090-6460
Кл.слова (ненормированные):
iron oxide ε-Fe2O3 -- nanoparticles -- size effect -- surface magnetic anisotropy
Аннотация: Polymorphic modification of iron oxide, known as ε-Fe2O3, exists only in the form of nanoparticles with characteristic sizes up to several tens of nanometers. Particles of these sizes exhibit a large coercive force, about 20 kOe at room temperature. In the temperature range of 80–150 K, a magnetic transition occurs in ε-Fe2O3, accompanied by a sharp decrease in the coercive force. At the same time, there are significant differences in the magnetic behavior of "large" (~20 nm) particles and ultra-small particles (up to 6 nm). A number of experimental facts indicate the manifestation of size effects that lead to a change in the magnetic structure in particles of these sizes. In addition, a surface effect is also manifested for such particles - a significant contribution to the magnetic behavior is governed by surface magnetic anisotropy. In this paper, a brief review of the manifestation of these size and surface effects in the magnetic properties of ε-Fe2O3 nanoparticles is carried out.

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Публикация на русском языке Проявление поверхностных и размерных эффектов в магнитных свойствах наночастиц ε-Fe2O3. (Краткий обзор) [Текст] / Д. А. Балаев, А. А. Дубровский, Ю. В. Князев [и др.]. - 10 с. // Физ. твердого тела. - 2023. - Т. 65 Вып. 6. - С. 979-988

Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
Институт катализа им. Г.К. Борескова СО РАН, Новосибирск, Россия

Доп.точки доступа:
Balaev, D. A.; Балаев, Дмитрий Александрович; Dubrovskii, A. A.; Дубровский, Андрей Александрович; Knyazev, Yu. V.; Князев, Юрий Владимирович; Semenov, S. V.; Семенов, Сергей Васильевич; Kirillov, V. L.; Martianov, O. N.; Nanophysics and Nanoelectronics, International Symposium(27 ; 13-16 March 2023 ; Nizhny Novgorod, Russia)
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