Low-power nonlinear effects in the ferromagnetic resonance of spheres of Ba3Zn2Fe24O41
1980; American Institute of Physics; Volume: 51; Issue: 3 Linguagem: Inglês
10.1063/1.327760
ISSN1520-8850
Autores Tópico(s)Magneto-Optical Properties and Applications
ResumoFoldover effects in the ferromagnetic resonance spectra of Ba3Zn2Fe24O41 (Zn2Z) were observed at 35 GHz. The critical microwave field for the effect was about two orders of magnitude smaller than that calculated for models of foldover due to magnetocrystalline anisotropy. Since these particles were spherical within optical microscope resolution, it is not anticipated that shape anisotropy contributes to this nonlinear effect. Because of the large anisotropy field (481 mT) it is likely that higher-order effects can also contribute to nonlinear behavior. This is the first reported example of foldover in a hexagonal ferrite.
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