| Presentation | 2020-10-05 Evaluation of perpendicular magnetic anisotropy in Co2FeSi/MgO bilayers Eisuke Matsushita, Yota Takamura, Yoshiya Stutler, Shigeki Nakagawa, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We investigated the origin of perpendicular magnetic anisotropy in full-Heusler alloy Co_2FeSi(CFS)/MgO bilayers in which CFS is expected as half-metallic ferromagnets. From analysis of CFS-thickness dependence of magnetic properties, the perpendicular magnetic anisotropy constant of the bulk contribution was found to be positive in a wide range of CFS-thickness from 0.4 nm to 1.4 nm and was drastically increased in less than 0.7 nm. The cross-sectional structures of these samples were observed by a scanning transmission electron microscope. Crystalized CFS layers were observed even in ultrathin film region. However, no significant difference was not observed in around 0.7 nm. Surprisingly, the atomic distance for out-of-plane direction was much larger in 1.4 nm thick CFS layer compared to calculated value based on the expected epitaxial relationship. In addition, the interdiffusion of Si was confirmed from CFS layers to buffer layers, suggesting non-stoichiometric composition of CFS layers. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Full-Heusler alloy / Half-metallic ferromagnet / Perpendicular magnetic anisotropy / Interfacial magnetic anisotropy / Scanning transmission electron microscope / Investigation of microstructure |
| Paper # | MRIS2020-4 |
| Date of Issue | 2020-09-28 (MRIS) |
| Conference Information | |
| Committee | MRIS / ITE-MMS |
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| Conference Date | 2020/10/5(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Recording Head, Spintronics, Solid State Memory, Media, etc. |
| Chair | Shuhei Yoshida(Kinki Univ.) / Kenji Machida(NHK) |
| Vice Chair | |
| Secretary | (Tohoku Inst. of Tech.) / (AIST) |
| Assistant | Yasuaki Nakamura(Ehime Univ.) / Yoshiyuki Hirayama(Samsung) |
| Paper Information | |
| Registration To | Technical Committee on Magnetic Recording & Information Storage / Technical Group on Multi-media Storage |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Evaluation of perpendicular magnetic anisotropy in Co2FeSi/MgO bilayers |
| Sub Title (in English) | |
| Keyword(1) | Full-Heusler alloy |
| Keyword(2) | Half-metallic ferromagnet |
| Keyword(3) | Perpendicular magnetic anisotropy |
| Keyword(4) | Interfacial magnetic anisotropy |
| Keyword(5) | Scanning transmission electron microscope |
| Keyword(6) | Investigation of microstructure |
| 1st Author's Name | Eisuke Matsushita |
| 1st Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| 2nd Author's Name | Yota Takamura |
| 2nd Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| 3rd Author's Name | Yoshiya Stutler |
| 3rd Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| 4th Author's Name | Shigeki Nakagawa |
| 4th Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| Date | 2020-10-05 |
| Paper # | MRIS2020-4 |
| Volume (vol) | vol.120 |
| Number (no) | MRIS-180 |
| Page | pp.pp.16-19(MRIS), |
| #Pages | 4 |
| Date of Issue | 2020-09-28 (MRIS) |