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Fabrication of Fully Epitaxial Co2Cr0.6Fe0.4Al/MgO/Co2Cr0.6Fe0.4Al Magnetic Tunnel Junctions
| Title: | Fabrication of Fully Epitaxial Co2Cr0.6Fe0.4Al/MgO/Co2Cr0.6Fe0.4Al Magnetic Tunnel Junctions |
| Authors: | Marukame, T. Browse this author | | Ishikawa, T. Browse this author | | Hakamata, S. Browse this author | | Matsuda, K.-I. Browse this author | | Uemura, T. Browse this author →KAKEN DB | | Yamamoto, M. Browse this author →KAKEN DB |
| Keywords: | Co-based full-Heusler alloy | | epitaxial growth | | half-metallic ferromagnet | | magnetic tunnel junction | | tunnel magnetoresistance |
| Issue Date: | Jun-2007 |
| Publisher: | IEEE |
| Journal Title: | IEEE Transactions on Magnetics |
| Volume: | 43 |
| Issue: | 6 |
| Start Page: | 2782 |
| End Page: | 2784 |
| Publisher DOI: | 10.1109/TMAG.2007.893698 |
| Abstract: | Fully epitaxial magnetic tunnel junctions (MTJs) of Co2Cr0.6Fe0.4Al (CCFA)/MgO/CCFA with exchange biasing were fabricated. The fabricated MTJs showed clear exchange-biased tunnel magnetoresistance (TMR) characteristics due to the CCFA/Ru/Co90Fe10/IrMn exchange-biased synthetic ferrimagnetic layer. The TMR characteristics were investigated as a function of in situ annealing temperature (Ta) for the upper CCFA layer. We obtained TMR ratios of 60% at room temperature (RT) and 238% at 4.2 K for MTJs with Ta of 400 degC, while those for MTJs with Ta of RT (i.e., having an as-deposited upper CCFA layer) were 17% at RT and 80% at 4.2 K. These results clearly suggest that the spin polarization of the as-deposited upper CCFA layer was significantly increased by in situ annealing. |
| Rights: | ©2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. IEEE, IEEE TRANSACTIONS ON MAGNETICS, 43, 6, 2007, 2782-2784. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/26426 |
| 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: 山本 眞史
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