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arxiv: cond-mat/0505259 · v1 · submitted 2005-05-10 · ❄️ cond-mat.stat-mech

Fluctuation-dissipation considerations and damping models for ferromagnetic materials

classification ❄️ cond-mat.stat-mech
keywords fluctuation-dissipationdampingsystemsbloch-bloembergencallen-weltonconsiderationsdemonstratediscussed
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The role of fluctuation-dissipation relations (theorems) for the magnetization dynamics with Landau-Lifshitz-Gilbert and Bloch-Bloembergen damping terms are discussed. We demonstrate that the use of the Callen-Welton fluctuation-dissipation theorem that was proven for Hamiltonian systems can give an inconsistent result for magnetic systems with dissipation.

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