Gyromagnetic resonators may be biased below, above or at the applied m
agnetic field required for ferrimagnetic resonance. A rigorous applied
field/frequency solution for a planar disc is presented here by using
a continuous model of material magnetization for these three regions
of magnetic bias. The nonlinear relationship between the classic tenso
r entry description and the applied field/frequency parameters is esta
blished. Good agreement between calculated and measured resonances are
also recorded.