Micromagnetic grain as a nonlinear oscillator
A new theoretical approach is considered to analyse the behaviour of micromagnetic grains. The coherent rotation of magnetizations is represented as dynamics of a nonlinear oscillator. The Langevin equations are introduced to study the role of thermal fluctuations and the corresponding Fokker–Planck...
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| Veröffentlicht in: | Journal of magnetism and magnetic materials 1999, Vol.195 (2), p.523-529 |
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| container_end_page | 529 |
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| container_issue | 2 |
| container_start_page | 523 |
| container_title | Journal of magnetism and magnetic materials |
| container_volume | 195 |
| creator | Safonov, Vladimir L. |
| description | A new theoretical approach is considered to analyse the behaviour of micromagnetic grains. The coherent rotation of magnetizations is represented as dynamics of a nonlinear oscillator. The Langevin equations are introduced to study the role of thermal fluctuations and the corresponding Fokker–Planck equation is obtained. It is shown that the conventional Landau–Lifshitz–Gilbert damping is consistent with thermodynamics only for small deviations of magnetization from the equilibrium state. The mean first passage time from the initial potential well is calculated. |
| doi_str_mv | 10.1016/S0304-8853(99)00143-2 |
| format | Article |
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The coherent rotation of magnetizations is represented as dynamics of a nonlinear oscillator. The Langevin equations are introduced to study the role of thermal fluctuations and the corresponding Fokker–Planck equation is obtained. It is shown that the conventional Landau–Lifshitz–Gilbert damping is consistent with thermodynamics only for small deviations of magnetization from the equilibrium state. 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| ispartof | Journal of magnetism and magnetic materials, 1999, Vol.195 (2), p.523-529 |
| issn | 0304-8853 |
| language | eng |
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| source | Elsevier ScienceDirect Journals |
| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties Domain effects, magnetization curves, and hysteresis Exact sciences and technology Magnetic grain Magnetic properties and materials Magnetic recording materials Nonlinear oscillator Physics Reversal Studies of specific magnetic materials Thermal fluctuations |
| title | Micromagnetic grain as a nonlinear oscillator |
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