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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
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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