Resonant suppression of thermal stability of the nanoparticle magnetization  by a rotating magnetic ﬁeld

Denysov, Stanislav Ivanovych; Poliakov, Oleksandr Yuriiovych; Liutyi, Taras Volodymyrovych

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Title	Resonant suppression of thermal stability of the nanoparticle magnetization by a rotating magnetic ﬁeld
Authors	Denysov, Stanislav Ivanovych Poliakov, Oleksandr Yuriiovych Liutyi, Taras Volodymyrovych
ORCID	http://orcid.org/0000-0001-9590-1001 http://orcid.org/0000-0001-8651-0463
Keywords	rotating magnetic ﬁeld fine mamgnetic particle magnetic moment stability precessional mode stochastic Landau-Lifshitz equation Fokker-Plank equation
Type	Article
Date of Issue	2011
URI	http://essuir.sumdu.edu.ua/handle/123456789/20269
Publisher	American Physical Society, USA
License	Copyright not evaluated
Citation	Phys. Rev. B 84, 174410 (2011)
Abstract	We study the thermal stability of the periodic (P) and quasiperiodic (Q) precessional modes of the nanoparticle magnetic moment induced by a rotating magnetic ﬁeld. An analytical method for determining the lifetime of the P mode, in the case of high anisotropy barrier and small amplitudes of the rotating ﬁeld, is developed within the Fokker-Planck formalism. In general case, the thermal stability of both P and Q modes is investigated by numerical simulation of the stochastic Landau-Lifshitz equation. We show analytically and numerically that the lifetime is a nonmonotonic function of the rotating ﬁeld frequency, which, depending on the direction of ﬁeld rotation, has either a pronounced maximum or a deep minimum near the Larmor frequency. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/20269
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