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Title Dynamical and thermal effects in nanoparticle systems driven by a rotating magnetic field
Authors Denysov, Stanislav Ivanovych  
Liutyi, Taras Volodymyrovych  
Hanggi, P.
Trohidou, K.N.
ORCID http://orcid.org/0000-0001-9590-1001
http://orcid.org/0000-0001-8651-0463
Keywords thermal effects
Landau-Lifshitz equation
Fokker-Planck equation
magnetic nanoparticle
rotating magnetic field
Type Article
Date of Issue 2006
URI http://essuir.sumdu.edu.ua/handle/123456789/2621
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Abstract We study dynamical and thermal effects that are induced in nanoparticle systems by a rotating magnetic field. Using the deterministic Landau-Lifshitz equation and appropriate rotating coordinate systems, we derive the equations that characterize the steady-state precession of the nanoparticle magnetic moments and study a stability criterion for this type of motion. On this basis, we describe i) the influence of the rotating field on the stability of the small-angle precession, ii) the dynamical magnetization of nanoparticle systems, and iii) the switching of the magnetic moments under the action of the rotating field. Using the backward Fokker-Planck equation, which corresponds to the stochastic Landau-Lifshitz equation, we develop a method for calculating the mean residence times that the driven magnetic moments dwell in the up and down states. Within this framework, the features of the induced magnetization and magnetic relaxation are elucidated. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2621
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