Ferromagnetic Resonance in Single Crystals of Fe-Ni Ferrite System

タイトル: Ferromagnetic Resonance in Single Crystals of Fe-Ni Ferrite System 著者: Usami, Seiji; Funatogawa, Zenya 抄録: Ferromagnetic resonance experiment on single crystals of Ni_xFe_O_4 (0.2≦x≦0.8) has been carried out at 9300Mc/s to study their ferromagnetic crystalline anisotropy and g-value. For all compositions a monotonic increase of K_1/M was observed as the temperature decreased, similarly to the curves obtained from the torque method. As a whole, however, considerably smaller values were obtained than the latter. g-value, also, increased as the temperature was decreased for all compositions and showed larger variations as x was smaller. Qualitative explanation was tried from the view point of Clogston's thermodynamic theory.