Abstract
Time-dependent two-magnon scattering was previously proposed as a mechanism to explain the large magnitude of the ferrimagnetic resonance (FMR) linewidth of barium ferrite as a function of frequency. In the present work, it is shown that a quantum mechanical mechanism like the Kasuya-Le Craw process (KL) but with the phonon excitation replaced by a single-particle excitation of a trigonal site iron ion, which moves in an anharmonic potential well, gives a linewidth contribution of less than a tenth of an Oersted and proportional to the frequency, as in the KL mechanism. We conclude, based on this work and our previous work on the KL mechanism, that neither of these mechanisms can explain the observed FMR linewidths in barium ferrite at any frequency.
Keywords
quantum mechanical mechanism, Kasuya-Le Craw process, KL, barium ferrite, trigonal site single particle excitations, FMR
Subject Categories
Ferromagnetic resonance, Scattering (Physics), Spin waves
Disciplines
Electromagnetics and photonics
Publisher
American Institute of Physics
Publication Date
7-15-1992
Rights Information
Copyright 1992 American Institute of Physics.
Rights Holder
American Institute of Physics
Permanent URL
Recommended Citation
Sokoloff, J. B.; Marshall, S. P.; and Vittoria, C., "Intrinsic ferromagnetic resonance linewidth of barium ferrite due to spin-wave scattering by trigonal site single-particle excitations" (1992). Electrical and Computer Engineering Faculty Publications. Paper 61. http://hdl.handle.net/2047/d20002232
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Notes
Originally published in Journal of Applied Physics 72, 612 (1992). DOI:10.1063/1.351841 (http://dx.doi.org/10.1063/1.351841).