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Magnetization Relaxation and Magnetization Dynamics
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Huei Li Huang
Department of Physics, National Taiwan University, Taipei, Taiwan 106, R.O.C. (Received November 13, 1997) |
| A phenomenological description of magnetization relaxation and dynamics is briefly reviewed and discussed. Inconsistency in spin wave damping calculation by means of the phenomenological approach in comparison with one using a microscopic approach leads naturally to a new form of the magnetization relaxation in which the modulus of magnetization is not conserved. Consideration of the nonconservation of magnetization modulus results in a new relaxational magnetization dynamic equation. Application of this new dynamic equation enables us to give a sartisfactory explanation why the ferromagnetic relaxation in domain is always at variance with that in the domain wall. |
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