Relaxation Effects inPara- and Ferromagnetic Resonance

Abstract
Magnetic resonance experiments have been carried out at 3-cm wavelength in para-magnetic and ferromagnetic samples at very high microwave power levels, in a temperature range between 77°K and 700°K. Changes in the microwave susceptibility and the dc magnetization have been observed for microwave amplitudes between 1 and 50 oersted.