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Proceedings Paper

Tunneling-type giant magnetoresistance of Fe-SiO2 granular thin films prepared by rf magnetron sputtering
Author(s): Yasushi Takemura; Keizo Watanabe; Keiichi Kakuno
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Paper Abstract

A tunneling magnetoresistance of Fe-SiO2 granular films was studied. The samples were prepared similarly by the preparation of multilayer films using two disks of Fe and SiO2 sputtering targets. The superparamagnetic feature and tunneling magnetoresistance were observed for the samples with Fe composition rate of lower than 0.45. Small Fe granules isolated by SiO2 matrix were observed by the transmission electron microscope. The magnetoresistance curves of these samples exhibited `two step' resistivity change, which was not observed from the annealed sample. This unique feature of tunneling magnetoresistance at a low magnetic field was presumably attributed to the existence of 2D structure of granules.

Paper Details

Date Published: 29 November 2000
PDF: 4 pages
Proc. SPIE 4086, Fourth International Conference on Thin Film Physics and Applications, (29 November 2000); doi: 10.1117/12.408469
Show Author Affiliations
Yasushi Takemura, Yokohama National Univ. (Japan)
Keizo Watanabe, Yokohama National Univ. (Japan)
Keiichi Kakuno, Yokohama National Univ. (Japan)


Published in SPIE Proceedings Vol. 4086:
Fourth International Conference on Thin Film Physics and Applications
Junhao Chu; Pulin Liu; Yong Chang, Editor(s)

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