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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Tugarinov V. I., Pankrats A. I., Kondyan S., Velikanov D. A., Temerov V. L.
Заглавие : Antiferromagnetic resonance and magnetic investigations of rare-earth ferroborates
Коллективы : Moscow International Symposium on Magnetism
Место публикации : Moscow Int. Symp. on Magnet. (MISM-2011): Book of abstracts. - 2011. - Ст.24OR-O-10. - P.623
Примечания : Библиогр.: 3. - Work is supported by RFBR grant 10-02-00765
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Martynov S. N., Tugarinov V. I., Martynov A. S.
Заглавие : Continual approach at T=0 in the mean field theory of incommensurate magnetic states in the frustrated Heisenberg ferromagnet with an easy axis anisotropy
Коллективы : Euro-Asian Symposium "Trends in MAGnetism", "Trends in MAGnetism", Euro-Asian Symposium, Институт физики им. Л.В. Киренского Сибирского отделения РАН
Место публикации : J. Magn. Magn. Mater.: Elsevier Science, 2017. - Vol. 440: EURO-Asian Symposium on Trends in Magnetism (EASTMAG) (AUG 15-19, 2016, Siberian Fed Univ, Krasnoyarsk, RUSSIA). - P.47-49. - ISSN 0304-8853, DOI 10.1016/j.jmmm.2016.12.086. - ISSN 1873-4766(eISSN)
Примечания : Cited References:9
Предметные рубрики: FERRIMAGNET
Аннотация: The algorithm of approximate solution was developed for the differential equation describing the anharmonical change of the spin orientation angle in the model of ferromagnet with the exchange competition between nearest and next nearest magnetic neighbors and the easy axis exchange anisotropy. The equation was obtained from the collinearity constraint on the discrete lattice. In the low anharmonicity approximation the equation is resulted to an autonomous form and is integrated in quadratures. The obvious dependence of the angle velocity and second derivative of angle from angle and initial condition was derived by expanding the first integral of the equation in the Taylor series in vicinity of initial condition. The ground state of the soliton solutions was calculated by a numerical minimization of the energy integral. The evaluation of the used approximation was made for a triple point of the phase diagram.
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Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Martynov S. N., Tugarinov V. I., Martynov A. S.
Заглавие : Continual approach at T=0 in the mean field theory of incommensurate magnetic states in the frustrated Heisenberg magnet with an easy axis anisotropy
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.O1.15. - P.54. - ISBN 978-5-904603-06-9 (Шифр -478014040)
Примечания : References: 2
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Martynov S. N., Tugarinov V. I., Martynov A. S.
Заглавие : Continual approach in the mean field theory of incommensurate magnetic states in the Frustrated Heisenberg ferromagnet
Место публикации : J. Sib. Fed. Univ. Math. Phys. - 2017. - Vol. 10, Is. 1. - P.55-59. - ISSN 1997-1397, DOI 10.17516/1997-1397-2017-10-1-55-59; Журн. СФУ. Сер. "Математика и физика"
Примечания : Cited References: 3
Аннотация: The algorithm of approximate solution has been developed for the differential equation describing the anharmonical change of the spin orientation angle in the model of ferromagnet with the exchange competition between nearest and next nearest magnetic neighbors and the easy axis exchange anisotropy. The obvious dependence of the angle velocity from angle and initial condition has been derived by expanding the first integral of the equation in the Taylor series in vicinity of initial condition. © Siberian Federal University. All rights reserved.Разработан алгоритм приближенного решения дифференциального уравнения, описывающего ангармоническое изменение угла ориентации спина в модели легкоосного ферромагнетика с конкуренцией обменов между ближайшими и следующими за ближайшими магнитными соседями. Явная зависимость угловой скорости от угла и начального условия получена путем разложения первого интеграла уравнения в ряд Тейлора в окрестности начального условия
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Edelman I. S., Zharkov S. M., Pankrats A. I., Vorotynov A. M., Tugarinov V. I., Ivantsov R. D., Petrov D. A., Velikanov D. A., Lin C. -R., Chen C. -C., Tseng Y. -T., Hsu H. -S.
Заглавие : Electron spin resonance in Cu1−xFexCr2Se4 nanoparticles synthesized with the thermal decomposition method
Место публикации : J. Magn. Magn. Mater.: Elsevier, 2017. - Vol. 436. - P.21-30. - ISSN 03048853 (ISSN), DOI 10.1016/j.jmmm.2017.04.006
Примечания : Cited References: 34. - The paper was partially supported by the President of Russia (Grant #NSh-7559.2016.2). We also thank the Ministry of Science and Technology of Taiwan, Taiwan, and the Siberian Branch of RAS, Russian Federation (MOST 102-2112-M-153-002-MY3) for the financial support.
Ключевые слова (''Своб.индексиров.''): anisotropy--association reactions--chromium compounds--decomposition--electrospinning--inorganic compounds--magnetic moments--magnetocrystalline anisotropy--nanoparticles--plates (structural components)--resonance--spin dynamics--synthesis (chemical)--temperature distribution--thermolysis--inter-particle interaction--nanoparticle (nps)--resonance spectrum--single-crystalline--temperature behavior--temperature decrease--temperature dependence--thermal decomposition methods--electron spin resonance spectroscopy
Аннотация: IIn this paper, we present a study of the electron spin resonance (ESR) of nanoparticles (NPs) of Cu1−xFexCr2Se4 chalcogenides with x = 0, 0.2, and 0.4. NPs were synthesized via the thermal decomposition of metal chloride salts and selenium powder in a high-temperature organic solvent. According to the XRD and HRTEM data, the NPs were single crystalline nearly hexagonal plates with the structure close to CuCr2Se4 (Fd-3m, a = 10.337 Å). For x = 0 and 0.2, the NPs tend to form long stacks consisting of the plates “face to face” attached to each other due to the magnetostatic interparticle interaction. Only separate NPs were observed in the case of x = 0.4. Peculiarities were revealed in the ESR temperature behavior for the NPs with x = 0 and 0.2 consistent with the features in the temperature dependences of the NPs magnetization. The non-monotonous dependence of the resonance field Hres on the temperature with a kink near 130 K and the energy gap in the resonance spectrum depending on the type of nanoparticle compacting are the distinct peculiarities. One of the main factors is discussed in order to explain the peculiarities: the coexistence of two types of anisotropy in the Cu1−xFexCr2Se4 NPs, in-plain shape anisotropy and magnetocrystalline anisotropy with four easy axes, which increases strongly with the temperature decrease.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Abramova G. M., Pankrats A. I., Petrakovskii G. A., Rasch JCE, Boehm M., Vorotynov A. M., Tugarinov V. I., Szumszak R., Bovina A. F., Vasil'ev V.
Заглавие : Electron spin resonance in CuCrS(2) chrome-copper disulphides synthesized by different methods
Разночтения заглавия :авие SCOPUS: Electron spin resonance in CuCrS 2 chrome-copper disulphides synthesized by different methods
Место публикации : J. Appl. Phys.: AMER INST PHYSICS, 2010. - Vol. 107, Is. 9. - Ст.93914. - ISSN 0021-8979, DOI 10.1063/1.3374679
Примечания : Cited References: 13
Предметные рубрики: COLOSSAL MAGNETORESISTANCE
PHYSICAL-PROPERTIES
TRANSITION
Ключевые слова (''Своб.индексиров.''): chemical vapor transport--electron spin resonance--ferromagnets--g-values--magnetic transitions--polycrystalline--synthesis method--temperature range--astatine--paramagnetism--resonance--single crystals--spin dynamics--crystal impurities
Аннотация: The electron spin resonance (ESR) in CuCrS(2) disulphides is found to be strongly dependent on a synthesis method used. At a temperature of 300 K, a polycrystalline CuCrS(2) sample is paramagnetic with a g-value of 1.95 at 40 K, it undergoes the magnetic transition. In the temperature range 4.2-290 K, a single-crystal sample prepared by a chemical vapor transport method exhibits the ESR features typical of a ferromagnet. It is shown that these features are related to the presence of a small amount of the single-crystal CuCr(2)S(4) impurity in the CuCrS(2) single crystal. (C) 2010 American Institute of Physics. [doi:10.1063/1.3374679]
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Abramova G. M., Szumszak R., Pankrats A. I., Петраковский, Герман Антонович, Vorotynov A. M., Tugarinov V. I., Bovina A. F., Vasil'ev A. D., Rasch J. C. E., Boehm M.
Заглавие : Electron spin resonance in CuCrS2 chrome-copper disulphides synthesized by different methods
Место публикации : Journal of Applied Physics: American Institute of Physics, 2010. - Т. 107, № 9. - С. 093914. - ISSN 0021-8979, DOI 10.1063/1.3374679. - ISSN 1089-7550(eissn)
РИНЦ
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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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pankrats A. I., Sablina K. A., Eremin M., Balaev A. D., Kolkov M., Tugarinov V. I., Bovina A. F.
Заглавие : Ferromagnetism and strong magnetic anisotropy of the PbMnBO4 orthoborate single crystals
Место публикации : J. Magn. Magn. Mater.: Elsevier, 2016. - Vol. 414. - P.82-89. - ISSN 0304-8853, DOI 10.1016/j.jmmm.2016.04.042
Примечания : Cited References: 20. - We acknowledge the assistance of A. Dubrovsky in magnetic measurements.This work was supported by the Russian Foundation for Basic Research, Projects nos. 13-02-00897 and 16-02-00563. MVE thanks for support the Russian Government Program of Competitive Growth of the Kazan Federal University, decision no. 930_p, May 22, 2015.
Предметные рубрики: PbMBO4 M
Resonance
Symmetry
Mn
Fe
Cr
Ключевые слова (''Своб.индексиров.''): strong ferromagnetic anisotropy--ferromagnetic resonance--exchange interactions
Аннотация: The PbMnBO4 orthoborate single crystals were first grown and their magnetic properties and ferromagnetic resonance were studied. It was found that the ferromagnetic state below the Curie temperature TC=31 K is characterized by the strong magnetic anisotropy. The significant effective anisotropy fields of PbMnBO4 determine the energy gap in the FMR spectrum, which is extraordinary large for ferromagnets (112 GHz at T=4.2 K). It was shown that the static Jahn-Teller effect characteristic of the Mn3+ ion leads to both the ferromagnetic ordering and the strong magnetic anisotropy in the crystal. In the strong external magnetic field the induced ferromagnetic ordering is retained in the crystal above the Curie temperature up to the temperatures multiply higher than TC. A weak anomaly of the dielectric permittivity was observed in PbMnBO4 at the Curie temperature at which the long-range ferromagnetic order is established. © 2016 Elsevier B.V. All rights reserved.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Martynov S. N., Tugarinov V. I.
Заглавие : Ground state of an antiferromagnet with uniform antisymmetric exchange in a magnetic field
Место публикации : JETP Letters. - 2010. - Vol. 92, Is. 2. - P.115-119. - ISSN 0021-3640, DOI 10.1134/S0021364010140092
Примечания : Cited References: 12
Предметные рубрики: INCOMMENSURATE
TRANSITION
ORDER
Аннотация: A system of two nonlinear differential equations for sublattice angles is proposed to describe the spin orientation distribution in a planar antiferromagnet with uniform antisymmetric exchange in a magnetic field. This system involves the initial symmetry of the problem and is reduced to a single delay differential equation. The solutions of this system are parameterized by the initial condition imposed on the angle of one sublattice at the hyperbolic singular point of the phase space. The numerical analysis of the stability boundary of soliton solutions demonstrates that the transition to the commensurate phase takes place outside the region where the stochastic solutions appear and is accompanied by the magnetization jump Delta m similar to 10(-1) m.
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