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| The Properties of Spin Valves with a Partially Oxidized Fe or CoFe Ultra-Thin Layer Inserted in the Magnetic Layers |
| Journal of Magnetics, Volume 11, Number 3, 30 Sep 2006, Pages 115-118 |
| Jang-sik In(Materials Science and Engineering, Yonsei University), Yoon-sung Han(Materials Science and Engineering, Yonsei University), Sung-hoon Kim(Materials Science and Engineering, Yonsei University), Jae-chul Shim(Materials Science and Engineering, Yonsei University), Jong-ill Hong(Materials Science and Engineering, Yonsei University) |
| Abstract |
| We successfully enhanced the performance of a spin valve by inserting an ultra-thin layer of partially oxidized Fe in the pinned and free layers. With the exchange bias field kept large, the spin valve reached a GMR of 12%, which corresponded to a 55% increase in GMR when we compared it with that of spin valves without any inserted layer. The layer of partially oxidized Fe was more effective for improving the properties of the spin valve than the layer of partially oxidized Co90Fe10. Considering all the results, we can contribute the significant improvement to the combined effect of the modified local electronic structures at the Fe impurities and the enhanced spin-dependent reflections at the α-Fe2O3 phase in the magnetic layer. |
| Keywords: spin valve; giant magnetoresistance; ultra-thin layer; oxidation |
| DOI: |
| Full Text: PDF |
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