| Presentation | 2013-03-08 Structural Characterization of 3d Ferromagnetic Transition Metal Thin Films Epitaxially Grown on (100)-Oriented Cubic Single-Crystal Substrates Mitsuru OHTAKE, Masaaki FUTAMOTO, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Thin films of 3d ferromagnetic transition metals (Fe, Co, and Ni)and teir alloys are prepared on MgO, SrTiO_3,and GaAs single-crystal substrates of (100)orientation. The growth behavior and the structure are investigated by RHEED, XRD, and HR-TEM. Fe, Fe_<65>Co_<35>,Fe_<50>Co_<50>,and Fe_<80>Ni_<20> (at %)films with bcc structure are formed on all the substrates. Co films epitaxially grown on MgO substrates at temperatures higher than 300℃ consist of hcp(1120)bi-crystals, whereas a Co epitaxial film deposited at 100℃ involves an fcc(100)crystal in addition to hcp(1120)crystals. Co_<80>Ni_<20> films grown on MgO substrates consist of a mixture of hcp(1120)and fcc(100)crystals regardless of growth temperature. Ni and Ni_<80>Fe_<20> films grown on MgO substrates include not only fcc(100)but also hcp(1120)crystals which are metastable and stabilized through hetero-epitaxial growth. As the film thickness increases, the Ni and the Ni_<80>Fe_<20> crystals of hcp(1120)orientation tend to transform into more stable fee crystals of (110)orientation by atomic displacement parallel to the hcp(0001)close-packed plane. Co, Co_<80>Ni_<20>,Ni, and Ni_<80>Fe_<20> films with fee strueture grow epitaxially on SrTiO_3 substrates. Metastable bcc crystals nucleate i early stages of Co, Ni, and Ni_<80>Fe_<20> film growth on GaAs substrates. With increasing the thickness, the metastable bcc structure starts to transform into fee strueture through atomic displacement parallel to the bcc{110} close-packed planes. XRD indicates that the strains in films epitaxially grown on MgO substrates are very small though the lattice mismatches are as large as 3-17%. Cross-sectional HR-TEM shows that a lot of misfit dislocations are introduced in the films around film/substrate interfaces to reduce the mismatches. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Fe / Co / Ni / Fe-Co / Co-Ni / Ni-Fe / thin film / epitaxial growth / crystal structure / stable phase / metastable phase |
| Paper # | MR2012-51 |
| Date of Issue |
| Conference Information | |
| Committee | MR |
|---|---|
| Conference Date | 2013/3/1(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) | Structural Characterization of 3d Ferromagnetic Transition Metal Thin Films Epitaxially Grown on (100)-Oriented Cubic Single-Crystal Substrates |
| Sub Title (in English) | |
| Keyword(1) | Fe |
| Keyword(2) | Co |
| Keyword(3) | Ni |
| Keyword(4) | Fe-Co |
| Keyword(5) | Co-Ni |
| Keyword(6) | Ni-Fe |
| Keyword(7) | thin film |
| Keyword(8) | epitaxial growth |
| Keyword(9) | crystal structure |
| Keyword(10) | stable phase |
| Keyword(11) | metastable phase |
| 1st Author's Name | Mitsuru OHTAKE |
| 1st Author's Affiliation | Faculty of Science and Engineering, Chuo University() |
| 2nd Author's Name | Masaaki FUTAMOTO |
| 2nd Author's Affiliation | Faculty of Science and Engineering, Chuo University |
| Date | 2013-03-08 |
| Paper # | MR2012-51 |
| Volume (vol) | vol.112 |
| Number (no) | 452 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |