Resonant suppression of thermal stability of the nanoparticle magnetization by a rotating magnetic field
Electronic Archive of Sumy State University
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Resonant suppression of thermal stability of the nanoparticle magnetization by a rotating magnetic field
|
|
| Creator |
Денисов, Станіслав Іванович
Денисов, Станислав Иванович Denysov, Stanislav Ivanovych Поляков, Олександр Юрійович Поляков, Александр Юрьевич Poliakov, Oleksandr Yuriiovych Лютий, Тарас Володимирович Лютый, Тарас Владимирович Liutyi, Taras Volodymyrovych |
|
| Subject |
rotating magnetic field
fine mamgnetic particle magnetic moment stability precessional mode stochastic Landau-Lifshitz equation Fokker-Plank equation |
|
| Description |
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. |
|
| Publisher |
American Physical Society, USA
|
|
| Date |
2011-11-13T11:26:23Z
2011-11-13T11:26:23Z 2011-11 |
|
| Type |
Article
|
|
| Identifier |
Phys. Rev. B 84, 174410 (2011)
1098-0121 http://essuir.sumdu.edu.ua/handle/123456789/20269 |
|
| Language |
en
|
|