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Information × Registration Number 0211U009408, 0111U006955 , R & D reports Title The generalized dissipation function of ferromagnets and relaxation processes in magnetics with degenerated states. popup.stage_title Head Danilevich Ivanov, Registration Date 14-12-2011 Organization Institute of magnetism of NASU popup.description2 The scientific problem of the relaxation processes description in magnetics with degenerate basic states is solved. It is shown, that Landau - Lifshits or Gilbert relaxation terms cannot describe the spin wave damping in case of degenerate basic state with continuous parameter of degeneration. The dissipative function for ferromagnetic crystals of different symmetry was constructed. These dissipative functions are based on magnetic crystal's symmetry. They also take in account laws of conservation and describe relaxation caused by both the exchange and relativistic interactions. The spin wave spectra and damping were calculated for ferromagnets with hexagonal and tetragonal symmetry. It is shown, that the proposed model is suitable for description of the relaxation processes in magnetics with degenerate basic states. The relaxation of the absolute value of magnetic moment is obtained. It is shown, that relaxation is two-stage process. Product Description popup.authors Данилевич О.Г. popup.nrat_date 2020-04-02 Close