Phase and delay formulas and their relationship to measurement procedures for spin-elastic waves in ferrimagnetics

Phase, resonance and group-delay formulas are derived on a classical basis for small-signal spin¿elastic waves propagating along the applied d.c. magnetic field in saturated nonellipsoidal geometry single-crystal ferrimagnetics. It is shown that both c.w. and pulse excitation, with shifting between adjacent resonances by frequency and the d.c. magnetic field, allow the group delay and internal magnetic-field profile, under certain restrictions, to be determined experimentally.