Source: http://www.mathnet.ru/php/archive.phtml?wshow=paper&jrnid=mm&paperid=3727&option_lang=eng
Timestamp: 2019-04-20 02:47:15+00:00

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Abstract: Numerical simulation of magnetic materials play an important role in the development of various spintronics devices. The most common way to construct mathematical model of magnetic material is to base it on the system of Landau–Lifshitz equations. For example for derivation of Landau–Lifshitz–Bloch equation multiplicative approximation of the mean field was implicitly used. That approximation corresponds in the equilibrium state to the Curie–Weiss theory. In this paper it is showed that multiplicative approximation does not describe the remagnetization process correctly. The phenomenological model that takes nearest neighbour correlations into account not only allows to obtain the correct values of the critical temperature and mean exchange energy of a system but also qualitatively describes the strongly nonequilibrium remagnetization processes.
Keywords: Landau–Lifshitz equation; modeling of magnetic materials; kinetic equations.
A. V. Ivanov, S. A. Khilkov, “K voprosu o kineticheskom modelirovanii tsepochki fazovykh ostsillyatorov”, Preprinty IPM im. M. V. Keldysha, 2016, 130, 20 pp.
A. V. Ivanov, S. A. Khilkov, “Beta-approksimatsiya dvukhchastichnoi funktsii raspredeleniya pri opisanii tsepochek fazovykh ostsillyatorov”, Preprinty IPM im. M. V. Keldysha, 2017, 087, 19 pp.
E. V. Zipunova, A. V. Ivanov, “K voprosu o testirovanii programmnykh kompleksov dlya modelirovaniya magnetikov”, Preprinty IPM im. M. V. Keldysha, 2017, 098, 30 pp.
A. V. Ivanov, “Ispolzovanie biblioteki aiwlib na primere chislennogo modelirovaniya stokhasticheskogo rezonansa”, Preprinty IPM im. M. V. Keldysha, 2018, 089, 30 pp.

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