| Presentation | 2022-03-04 Structure and Magnetic Properties of Mn-Al Epitaxial Films Shota Noro, Mitsuru Ohtake, Shinji Isogami, Masaaki Futamoto, Tetsuroh Kawai, Fumiyoshi Kirino, Nobuyuki Inaba, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Mn-Al alloy films are prepared on Cr(001) single-crystalline underlayers by varying the Mn content from 50 to 72 at. %, the growth temperature from room temperature to 500 °C, and the thickness from 10 to 100 nm. The growth mechanism of Mn-Al film with high degree of L10 ordering is investigated. L10 phase is formed in the Mn-Al films with Mn compositions of 50?65 at. %. Single L10 phase is realized only at an Mn-rich composition of 58 at. %, whereas A12 and A2 phases are respectively involved at the stoichiometric composition of 50 at. % and at a more Mn-rich composition of 65 at. %. The formation of L10 phase is stabilized at the slightly Mn-rich composition. As the film thickness decreases, the degree of L10 ordering is enhanced. The result indicates that the strain caused by lattice mismatch promotes L10 ordering. As the growth temperature increases, the order degree is improved but the surface roughness increases. Therefore, it is shown that two-step formation method consisting of growth at a moderate temperature at 300 °C followed by annealing at a high temperature of 500 °C is effective in obtaining L10 phase with high order degree while keeping flat surface. Mn-Al films with L10 structure show strong perpendicular magnetic anisotropies reflecting the magnetocrystalline anisotropy. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Mn-Al alloy / L10 ordered phase / thin film / epitaxial growth / perpendicular magnetic anisotropy |
| Paper # | MRIS2021-16 |
| Date of Issue | 2022-02-25 (MRIS) |
| Conference Information | |
| Committee | MRIS / IEE-MAG |
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| Conference Date | 2022/3/4(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Nagoya Univ. and Online (Hybrid) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Optical recording. Magnetic recording. and Others |
| Chair | Shuhei Yoshida(Kinki Univ.) |
| 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 Meeting on Magnetics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Structure and Magnetic Properties of Mn-Al Epitaxial Films |
| Sub Title (in English) | |
| Keyword(1) | Mn-Al alloy |
| Keyword(2) | L10 ordered phase |
| Keyword(3) | thin film |
| Keyword(4) | epitaxial growth |
| Keyword(5) | perpendicular magnetic anisotropy |
| 1st Author's Name | Shota Noro |
| 1st Author's Affiliation | Yokohama National University(Yokohama Nat. Univ.) |
| 2nd Author's Name | Mitsuru Ohtake |
| 2nd Author's Affiliation | Yokohama National University(Yokohama Nat. Univ.) |
| 3rd Author's Name | Shinji Isogami |
| 3rd Author's Affiliation | National Institute for Materials Science(NIMS) |
| 4th Author's Name | Masaaki Futamoto |
| 4th Author's Affiliation | Yokohama National University(Yokohama Nat. Univ.) |
| 5th Author's Name | Tetsuroh Kawai |
| 5th Author's Affiliation | Yokohama National University(Yokohama Nat. Univ.) |
| 6th Author's Name | Fumiyoshi Kirino |
| 6th Author's Affiliation | Tokyo University of the Arts(Tokyo Univ. Arts) |
| 7th Author's Name | Nobuyuki Inaba |
| 7th Author's Affiliation | Yamagata University(Yamagata Univ.) |
| Date | 2022-03-04 |
| Paper # | MRIS2021-16 |
| Volume (vol) | vol.121 |
| Number (no) | MRIS-402 |
| Page | pp.pp.1-6(MRIS), |
| #Pages | 6 |
| Date of Issue | 2022-02-25 (MRIS) |