FERROMAGNETIC-RESONANCE SPECTRA OF ORIENTED BARIUM FERRITE TAPES

Ferromagnetic resonance spectra have been measured for three barium ferrite tapes at 34.5 GHz for two different orientations of the tapes with respect to the static and microwave fields. The orientation distributions in the tapes have been measured using x-ray diffraction, and these distributions have been used to calculate the spectra using the Landau-Lifshitz equation. The anisotropy energy, damping constant, and volume packing fraction have been used as adjustable parameters in the calculations. Calculated spectra were in good agreement with measurements. Anisotropy constants and damping constants determined from the fits are consistent with results reported for fine particle assemblies.