TiO2被覆マグネタイトの磁気抵抗効果＜論文＞
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TiO2-coated Fe3O4 samples were prepared by the sol-gel processing. The samples were sintered in vacuum at 1000℃ for 2 hours. MR ratio became the maximum of 3.78 % for the 1.54 vol. % TiO2 sample. The MR ratio is twice as large as that of Fe3O4. Also, we have measured temperature (T) dependence of resistivity (p) for the TiO2-coated Fe3O4 samples, and confirmed that p was in proportion to T1/2 for the best MR-ratio sample. This suggests that the granular-type tunnel conduction takes place in the system, and that the best MR ratio is caused by the tunnel magnetoresistance effect.
- 埼玉大学工学部の論文
埼玉大学工学部 | 論文
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