Dynamical and thermal effects in nanoparticle systems driven by a rotating magnetic field
Electronic Archive of Sumy State University
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Dynamical and thermal effects in nanoparticle systems driven by a rotating magnetic field
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| Creator |
Denysov, Stanislav Ivanovych
Денисов, Станислав Иванович Liutyi, Taras Volodymyrovych Лютый, Тарас Владимирович Hanggi, P. Trohidou, K.N. Денисов, Станіслав Іванович Лютий, Тарас Володимирович |
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| Subject |
thermal effects
Landau-Lifshitz equation Fokker-Planck equation magnetic nanoparticle rotating magnetic field |
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| Description |
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. |
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| Date |
2011-01-13T08:05:22Z
2011-01-13T08:05:22Z 2006 |
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| Type |
Article
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| Identifier |
http://essuir.sumdu.edu.ua/handle/123456789/2621
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| Language |
en
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| Relation |
Phys. Rev. B 74, 104406 (2006)
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