# A phenomenological theory of damping in ferromagnetic materials

@article{Gilbert2004APT, title={A phenomenological theory of damping in ferromagnetic materials}, author={Thomas L. Gilbert}, journal={IEEE Transactions on Magnetics}, year={2004}, volume={40}, pages={3443-3449} }

In 1955, a phenomenological theory of ferromagnetism was well established and had been corroborated by a considerable amount of experimental data. However, there were problems in the phenomenological theory of the dynamics of the magnetization field. The Landau-Lifshitz equation for damping of the motion of the magnetization field could not account for the large noneddy-current damping in thin Permalloy sheets. The problem undertaken herein is a reformulation of the theory in a way that is more…

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