粉末図形法による希土類鉄ガーネットの局所磁区観察
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概要
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Observation of local magnetic domain in (Tb_1Gd_1Bi_1)_3(Fe_9Al_1)_5O_12 bulk material, which has perpendicular magnetic anisotropy, was performed by bitter technique. Using the hand-made coil and microscope system, the several μm-sized domain patterns at zero- field was successfully visualized. The magnetic field dependence of domain structure was evaluated. It is found that the magnetization process in this sample is explained by the change in the domain size.