抄録
Crystalline BiFeO3 (perovskite) is easily amorphized at room temperature by ball milling. The amorphization of crystalline ZnFe2O4 (spinel) by ball milling is very difficult. Nearly half of Fe atom sites change from octahedral [FeO6] to tetrahedral [FeO4] in amorphous BiFeO3. Ball milled amorphous BiFeO3 is more relaxed than melt-quenched amorphous BiFeO3. Antiferromagnetism in the crystalline state is partially converted into a ferromagnetic-like state in ball milled amorphous BiFeO3-ZnFe2O4 under magnetic field.
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