Note on the Ferromagnetic Resonance Absorption
1957; Oxford University Press; Volume: 17; Issue: 5 Linguagem: Inglês
10.1143/ptp.17.659
ISSN1347-4081
Autores Tópico(s)Magnetic properties of thin films
ResumoThe theory of ferromagnetic resonance absorption is discussed in Hamiltonian form. The general formula of magnetic resonance absorption in a ferromagnetic single crystal is obtained when the applied magnetic field has arbitrary intensity and direction. This formula reduces to Kittel's formula in the case of infinitely strong applied field. When a magnetic field is applied in a direction near the hard axis, an additional resonance is possible in the non-aligned state of magnetization vector to the direction of the applied field. It is concluded, however, that the mechanism described above is not responsible for double peaks in iron single crystal which are reported by Kip-Arnold and in cobalt ferrite by Tannenwald. The resonance frequencies for antiferromagnetic crystals of ordinary two sublattices type and that of triangular lattice are obtained by a similar method.
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