Gilbert ferromagnetic damping theory and the fluctuation-dissipation theorem
The phenomenological Gilbert-Landau-Lifshitz theory of magnetic damping in ordered magnetic materials has long served as the central model employed in the analysis of considerable experimental magnetic resonance data. The problem undertaken here is to formulate the microscopic basis of the model in...
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| Online Access: | http://hdl.handle.net/2047/d20002227 |
| Summary: | The phenomenological Gilbert-Landau-Lifshitz theory of magnetic damping in ordered magnetic materials has long served as the central model employed in the analysis of considerable experimental magnetic resonance data. The problem undertaken here is to formulate the microscopic basis of the model in terms of usual theory of irreversible transport embodied in the fluctuation-dissipation-response theorems. As an application of the general method we establish a rigorous relationship between magnetic damping and acoustic damping implicit in magnetoelastic models. |
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