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Spin‐Wave Relaxation in Ferromagnetic Alloys
Author(s) -
Kogan E. M.,
Turov E. A.,
Voloshinskii A. N.
Publication year - 1980
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220980116
Subject(s) - condensed matter physics , laser linewidth , spin wave , magnon , ferromagnetic resonance , ferromagnetism , relaxation (psychology) , saturation (graph theory) , electron , spin (aerodynamics) , electrical resistivity and conductivity , resonance (particle physics) , magnetization , materials science , physics , magnetic field , atomic physics , laser , quantum mechanics , psychology , social psychology , mathematics , combinatorics , thermodynamics
The relaxation width of ferromagnetic and spin‐wave resonance lines in disordered alloys is investigated. Long‐wave spin waves are obtained in this system using simplest approximations (based on averaging over a physically small volume). The relaxation of these spin waves is due to the absorption of magnons by conduction electrons. The presence of disorder in the system leads to the non‐conservation of the total quasi‐momentum in these processes, thus making them effective, in contrast to ordered metals and alloys. The linewidth obtained, Δ B , is proportional to the resonance frequency and residual resistivity, and inversely proportional to the saturation magnetization. Both the linewidth and its dependence on the parameters are in good agreement with experiment.