Fluctuation-dissipation considerations and damping models for ferromagnetic materials

Details Fluctuation-dissipation considerations and damping models for ferromagnetic materials Fluctuation-dissipation considerations and damping models for ferromagnetic materials

2005-05-10

arxiv.org/abs/cond-mat/0505259v1

Phys. Rev. B (2005)

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1103/PhysRevB.71.224402

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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