2005年8月
Large magnetoresistance ratio of 10% by Fe50Co50 layers for current-confined-path current-perpendicular-to-plane giant magnetoresistance spin-valve films
APPLIED PHYSICS LETTERS
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- 巻
- 87
- 号
- 8
- 開始ページ
- 082507
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1063/1.2009837
- 出版者・発行元
- AMER INST PHYSICS
We have realized a large magnetoresistance (MR) ratio of 10.2% by current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) spin-valve films having current-confined-path (CCP) structure formed by AlCu-NOL (nano-oxide-layer). CPP-GMR with conventional Co90Fe10 pinned and free layers showed an MR ratio and a Delta RA (the change of resistance area product) were 4% and 20 m Omega mu m(2), respectively, at a small RA (resistance area product) of 500 m Omega mu m(2). By replacing the Co90Fe10 layers by Fe50Co50 layers both for pinned and free layers, we have successfully realized a MR ratio and a Delta RA of 7.5% and 37.5 m Omega mu m(2), respectively, at a small RA of 500 m Omega mu m(2). Moreover, a large MR ratio of 10.2% and a large Delta RA of 418 m Omega mu m(2) were realized at a relatively large RA of 4100 m Omega mu m(2). This large MR ratio by using Fe50Co50 layers was due to a larger spin-dependent interface scattering factor gamma of 0.72 for the interface between Fe50Co50 and Cu, which was improved from a gamma of 0.62 for the interface between Co90Fe10 and Cu. (c) 2005 American Institute of Physics.
- リンク情報
- ID情報
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- DOI : 10.1063/1.2009837
- ISSN : 0003-6951
- Web of Science ID : WOS:000231310700035