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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 1998.12
- 수록면
- 127 - 133 (7page)
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초록· 키워드
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I have overviewed the change in GMR on annealing, in conjunction with the change in microstructure. The Co_(46)Al_(19)O_(35) granular thin films were annealed at 300℃ for various annealing time to change the microstructure. The magnitude of GMR decreases considerably with increasing annealing time, although the size of Co granules estimated from TEM observation show a small change. Parameter fits of magnetization curves and magnetoresistance curves to the Langevin function suggest that large clusters consisting of several small Co granules, which are coupled ferromagnetically, are related with the decrease of GMR on annealing. The temperature dependence of electrical resistivity (p) shows the relationship of log p versus T^(-½) for the sample annealed for 10 min., 1 hr. and 6 hrs. However, the sample annealed for 38 hrs. shows the relationship of log p versus T^(-¼), which represents a significant change in the transport mechanism.
목차
Abstract
1. Introduction
2. Experimental Procedure
3. Results and Discussions
4. Summary
Acknowledgments
References
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