| Presentation | 2011-12-15 Epitaxial Growth of FePt, FePd, CoPt, and CoPd Alloy Thin Films on MgO Single-Crystal Substrates Mitsuru OHTAKE, Shouhei OUCHI, Fumiyoshi KIRINO, Masaaki FUTAMOTO, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | FePt, FePd, CoPt, and CoPd alloy epitaxial films are prepared on MgO single-crystal substrates of (001), (110), and (111) orientations by ultra-high vacuum RF magnetron sputtering. The effects of film material, substrate orientation, and substrate temperature on the film growth, the film structure, and the magnetic properties are investigated. L1_0 ordered phase formation is observed for FePt and FePd films prepared on all the MgO substrates at elevated temperatures. L1_0 ordered CoPt epitaxial films are also obtained on MgO (001) and MgO (110) substrates heated at 600℃. With increasing the substrate temperature, the L1_0 ordered phase formation is enhanced for these films. The degree of L1_0 ordering varies depending on the film material. A higher ordering parameter is observed in the order of FePd > FePt > CoPt. On MgO (001) substrates, the L1_0-FePd films consist of (001) crystals with the c-axis normal to the substrate surface, whereas the L1_0-FePt and the L1_0-CoPt films include (100) crystals whose c-axis is parallel to the substrate surface in addition to (001) crystals. On MgO (110) substrates, the L1_0-FePt and the L1_0-FePd films involve (110) and (011) crystals whose oaxes are respectively in-plane and about 45° canted from the perpendicular direction, while the L1_0-CoPt film consists of a (110) crystal, (111)-oriented L1_0-FePt and L1_0-FePd films with the c-axis about 55° canted from the perpendicular direction epitaxially grow on MgO (111) substrates with six variants. Metastable L1_1 ordered phase formation is recognized for CoPt films epitaxially grown on MgO (111) substrates. As the substrate temperature increases up to 300℃, the L1_1 ordering degree increases. With further increasing the substrate temperature, the ordering degree declines. No ordered phases are recognized for CoPd films. The magnetic properties are influenced by the crystal structure, the film orientation, and the ordering degree. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | FePt / FePd / CoPt / CoPd / L1_0 ordered phase / L1_1 ordered phase / thin film / epitaxial growth / MgO substrate |
| Paper # | MR2011-31 |
| Date of Issue |
| Conference Information | |
| Committee | MR |
|---|---|
| Conference Date | 2011/12/8(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Magnetic Recording (MR) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Epitaxial Growth of FePt, FePd, CoPt, and CoPd Alloy Thin Films on MgO Single-Crystal Substrates |
| Sub Title (in English) | |
| Keyword(1) | FePt |
| Keyword(2) | FePd |
| Keyword(3) | CoPt |
| Keyword(4) | CoPd |
| Keyword(5) | L1_0 ordered phase |
| Keyword(6) | L1_1 ordered phase |
| Keyword(7) | thin film |
| Keyword(8) | epitaxial growth |
| Keyword(9) | MgO substrate |
| 1st Author's Name | Mitsuru OHTAKE |
| 1st Author's Affiliation | Faculty of Science and Engineering, Chuo University() |
| 2nd Author's Name | Shouhei OUCHI |
| 2nd Author's Affiliation | Faculty of Science and Engineering, Chuo University |
| 3rd Author's Name | Fumiyoshi KIRINO |
| 3rd Author's Affiliation | Tokyo National University of Fine Arts and Music |
| 4th Author's Name | Masaaki FUTAMOTO |
| 4th Author's Affiliation | Faculty of Science and Engineering, Chuo University |
| Date | 2011-12-15 |
| Paper # | MR2011-31 |
| Volume (vol) | vol.111 |
| Number (no) | 350 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |