CONVENTIONAL AND PHOTOTHERMALLY MODULATED FERROMAGNETIC-RESONANCE INVESTIGATIONS OF A ND2FE17 POWDER SAMPLE

We report ferromagnetic resonance (FMR) and photothermally modulated f erromagnetic resonance (PM-FMR) results for the ferromagnetic alloy Nd 2Fe17. Calculations for the ferromagnetic resonance signal with the ma gnetization in the non-saturated regime are presented. A theoretical m odel to describe the FMR and PM-FMR spectra of this material in the fo rm of a non-oriented pressed powder is discussed and fair agreement be tween experimental and calculated spectra is obtained. Our own numeric al values of magnetization obtained over a wide temperature range are used for the PM-FMR signal calculation as well as resonance field and linewidth from our FMR experiments.