Microwave Resonance Absorption in Ferromagnetic Semi-Conductor. I : Nickel Ferrite

The microwave resonance absorption in NiOFe_2O3 was observed in the range of 7.5 cm and 3.2cm wave-length, and the magnetic saturation value of NiOFe_2O_6 was determined by means of the method of Ismuth\u27s rotating pole. From these measurements, g-value was calculated by Kittel\u27s formula and found to be g=2.26±0.02 at 3.2 cm and g=2.03±0.10 at 7 cm respectively; thus it was ascertained experimentally that as the wave length becomes shorter, the g-value becomes greater, even supposing the probable error in the experiment