島根大学論集. 自然科学

number of downloads : ?
島根大学論集. 自然科学 10
1961-03-20 発行

多結晶ニッケル・カドミューム・フェライトの磁気共鳴に於ける半値巾の温度特性

Temperature Dependence of the Line Width of Ferrimagnetic Resonance in Polycrystalline Nickel Cadmium Ferrite
Takemoto, Susumu
File
Description
Ferrimagnetic resonance experiments were carried out on polycrystalline nickel cadmium ferrite (Ni_<0・7>Cd_<0・3>Fe_2O_4) in the temperature range from -180℃ to 100℃ at 9500MC and 24000MC in order to investigate the temperature dependence of the line width ⊿H and the g-value.
The writer used a standard electron spin resonace equipment at 9500MC, because of the high fidelity in measurements. As a result, it was clarified that the line width ⊿H is affected to a great extent by both the temperature and the frequency, in such a way that it increases with decreasing temperature and with increasing frequency. The measured line width was 400 oersted at -180℃ and 140 oersted at 100℃, showing a tendency to increase markedly with decreasing temperature below 0℃. The g-value was 2.13 at -180℃ and 2.03 at 100℃, gradually increasing with decreasing temperature. It was further known that the resonance field and the line width were remarkably affected by a slight deviation of the sample shape from sphericity.