Impedance matrix of thin metallic ferromagnetic films and SSWR in parallelconfiguration

Standing spin-wave resonance spectra of metallic ferromagnetic films in par allel configuration are calculated analytically for the general cases of di fferent external microwave field amplitudes and different surface anisotrop ies at the two film surfaces, and expressed in terms of a surface impedance matrix. Relations to the transfer matrix introduced by Vittoria in a simil ar context and examples of computed absorption spectra for two typical mate rials with different exchange-conductivity parameters are discussed. (C) 20 00 Published by Elsevier Science B.V. All rights reserved.