FMR in the anisotropy field consider a spherical specimen of a uniaxial ferromagnetic crystal with an anisotropy
Question:
FMR in the anisotropy field consider a spherical specimen of a uniaxial ferromagnetic crystal with an anisotropy energy density of the form UK = K sin2 θ, where θ is the angle between the magnetization and the z axis. We assume that K is positive. Show that the ferromagnetic resonance frequency in an external magnetic field B0z is w0 = γ(B0 + BA), where BA = 2K/Ms.
Step by Step Answer:
For small 9 we have U KO Now the magnetic energy density UBM cos 0 BM ...View the full answer
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