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November 1, 2004IEEE Transactions on Magnetics

Classics in Magnetics A Phenomenological Theory of Damping in Ferromagnetic Materials

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Authors

TGT. L. GilbertOrdnance Survey

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Implication

Theoretical study demonstrates a reformulated damping equation for dynamic magnetization fields in ferromagnetic materials, highlighting mechanisms behind large energy losses in thin Permalloy sheets.

Key Points

  • Reformulate the phenomenological theory of magnetization field dynamics to accurately model systems exhibiting large noneddy-current damping, addressing deficiencies in the Landau-Lifshitz equation.
  • Re-evaluated the dynamical equations governing magnetization fields against experimental observations from thin Permalloy sheets showing large noneddy-current damping.
  • Restructured the mathematical description of magnetic damping to correspond directly with generalized dissipation models used in other physical systems.
  • Identifies that the conventional Landau-Lifshitz equation fails to capture high damping regimes observed experimentally in thin magnetic films.
  • Establishes a revised phenomenological damping framework capable of consistently describing both small and large damping behaviors in ferromagnetic media.

Cite This Study

T. L. Gilbert (2004) studied this question.

synapsesocial.com/papers/69d7bea4ae371f9756ae2a09https://doi.org/10.1109/tmag.2004.836740
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