Abstract
Results are presented on the 33-GHz ferromagnetic resonance and spin wave resonance spectra of single and multilayer NiFe/FeAlN films deposited by RF diode sputtering. The following films were prepared: FeAlN/glass, NiFe/glass, NiFe/FeAlN/glass and NiFe/FeAlN/NiFe/glass. For all the FeAlN films a spectrum of volume spin waves is observed. The exchange constant A calculated from the spin wave resonance spectrum is between 1.6 and 1.8*10/sup -6/ erg cm/sup -1/. The effective anisotropy field 4 pi M/sub s/ and g-values are -17.7 kOe, 18.1 kG, 2.19 and -9.1 kOe, 9.4 kG, 2.14 for the FeAlN and the NiFe, respectively. In the bilayer and the trilayer films, an extra resonance is observed which lies at a field value in between the NiFe and FeAlN resonances for the in-plane applied field. This resonance is attributed to a surface spin wave mode. >
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