FERROMAGNETIC-RESONANCE SPECTRA OF ORIENTED BARIUM FERRITE TAPES

Ferromagnetic resonance spectra have been measured for three barium fe rrite tapes at 34.5 GHz for two different orientations of the tapes wi th respect to the static and microwave fields. The orientation distrib utions in the tapes have been measured using x-ray diffraction, and th ese distributions have been used to calculate the spectra using the La ndau-Lifshitz equation. The anisotropy energy, damping constant, and v olume packing fraction have been used as adjustable parameters in the calculations. Calculated spectra were in good agreement with measureme nts. Anisotropy constants and damping constants determined from the fi ts are consistent with results reported for fine particle assemblies.