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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