著者

奥野 志保 橋本 進 猪俣 浩一郎 森本 せつ 伊藤 厚子

出版者

公益社団法人 日本磁気学会

雑誌

日本応用磁気学会誌 (ISSN:02850192)

巻号頁・発行日

vol.14, no.2, pp.213-216, 1990

被引用文献数

2

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Amorphous Co-ferrite thin films not containing glass formers were prepared by ion beam sputter deposition. Their magnetic properties were invetigated by means of low field dc magnetization and ac susceptibility measurements, which gave evidence of spin glass behavior. Temperature dependence of magnetization in an external field of 50 Oe exhibited an irreversibility below nearly room temperature, which decreased with increasing field. A cusp corresponding to spin freezing temperature was observed at 284 K in ac susceptibility measured at 80 Hz, 1 Oe. Below this temperature, relaxation of thermoremanent magnetization was observed. Besides this transition at 284 K, a sharp peak which suggests another transition was observed at 86 K in ac susceptibility. It is considered that the spin glass ordering with a high spin freezing temperature is mainly caused by amorphousization for strong super-exchange interactions.