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Hokkaido University Collection of Scholarly and Academic Papers >
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Influence of off-stoichiometry on magnetoresistance characteristics of Co2MnSi/Ag-based current-perpendicular-to-plane spin valves
| Title: | Influence of off-stoichiometry on magnetoresistance characteristics of Co2MnSi/Ag-based current-perpendicular-to-plane spin valves |
| Authors: | Inoue, Masaki Browse this author | | Hu, Bing Browse this author | | Moges, Kidist Browse this author | | Inubushi, Kazuumi Browse this author | | Nakada, Katsuyuki Browse this author | | Yamamoto, Masafumi Browse this author →KAKEN DB | | Uemura, Tetsuya Browse this author →KAKEN DB |
| Issue Date: | 21-Aug-2017 |
| Publisher: | American Institute of Physics (AIP) |
| Journal Title: | Applied physics letters |
| Volume: | 111 |
| Issue: | 8 |
| Start Page: | 82403 |
| Publisher DOI: | 10.1063/1.5000244 |
| Abstract: | The influence of off-stoichiometry of Co2MnSi (CMS) spin sources on giant magnetoresistance characteristics was investigated for CMS/Ag-based current-perpendicular-to-plane spin valves prepared with various Mn compositions a in Co2Mn alpha Si0.82 electrodes. The magnetoresistance ratio of the prepared CMS/Co50Fe50 (CoFe) (1.1 nm)/Ag/CoFe (1.1)/CMS spin valves systematically increased with a from 11.4% for Mn-deficient alpha = 0.62 to 20.7% for Mn-rich alpha = 1.45 at 290 K. This result suggests that increasing a from a Mn-deficient to Mn-rich value increases the spin polarization by suppressing Co-Mn antisites harmful to the half-metallicity. Thus, our results demonstrate that appropriately controlling the film composition toward a Mn-rich one is highly effective for enhancing the half-metallicity of CMS in CMS-based spin valves, as it is in CMS-based magnetic tunnel junctions. Published by AIP Publishing. |
| Rights: | This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing.The following article appeared in Appl. Phys. Lett.111, 082403 (2017); doi: 10.1063/1.5000244, and may be found at http://dx.doi.org/10.1063/1.5000244. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/71320 |
| Appears in Collections: | 情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 植村 哲也
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