Fe-Al alloy single-crystal thin film preparation for basic magnetic measurements
Fe100–xAlx (x = 0, 4, 10, 20, 30 at. %) alloy films of 40 nm thickness are prepared on MgO(001) single-crystal substrates by varying substrate temperature from room temperature to 600 °C. Single-crystal films of (001) orientation with bcc-based disordered A2 structure are obtained for the Al content...
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2018-04-01
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Online Access: | http://dx.doi.org/10.1063/1.4991910 |
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doaj-5ad45d03335449099f554ca7d79ab6092020-11-25T00:25:33ZengAIP Publishing LLCAIP Advances2158-32262018-04-0184047710047710-910.1063/1.4991910041891ADVFe-Al alloy single-crystal thin film preparation for basic magnetic measurementsTatsuya Abe0Tetsuroh Kawai1Masaaki Futamoto2Mitsuru Ohtake3Nobuyuki Inaba4Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, JapanFaculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, JapanFaculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, JapanFaculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, JapanFaculty of Engineering, Yamagata University, 4-3-16 Jyonan, Yonezawa 992-8510, JapanFe100–xAlx (x = 0, 4, 10, 20, 30 at. %) alloy films of 40 nm thickness are prepared on MgO(001) single-crystal substrates by varying substrate temperature from room temperature to 600 °C. Single-crystal films of (001) orientation with bcc-based disordered A2 structure are obtained for the Al content range of x = 0 - 20 at. %. An ordered phase of DO3 structure is observed in Fe70Al30 films prepared at temperatures higher than 200 °C, whereas (001) oriented single-crystal films of A2 structure are obtained when prepared at room temperature. The film surface profile does not depend much on the film composition, while the surface roughness increases with increasing substrate temperature. Island-like crystals are observed for films prepared at 600°C for all compositions. Difference in lattice spacing measured parallel and perpendicular to the substrate is noted for the single-crystal thin films and it increases with increasing Al content. The lattice strain in single-crystal film is caused possibly to accommodate the lattice mismatch with the MgO substrate. The (001)-oriented single-crystal films with A2 structure show four-fold symmetries in in-plane magnetic anisotropy with the easy magnetization axis A2[100] and the hard magnetization axis A2[110], whereas the films with DO3 ordered structure show almost isotropic magnetic properties.http://dx.doi.org/10.1063/1.4991910 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tatsuya Abe Tetsuroh Kawai Masaaki Futamoto Mitsuru Ohtake Nobuyuki Inaba |
spellingShingle |
Tatsuya Abe Tetsuroh Kawai Masaaki Futamoto Mitsuru Ohtake Nobuyuki Inaba Fe-Al alloy single-crystal thin film preparation for basic magnetic measurements AIP Advances |
author_facet |
Tatsuya Abe Tetsuroh Kawai Masaaki Futamoto Mitsuru Ohtake Nobuyuki Inaba |
author_sort |
Tatsuya Abe |
title |
Fe-Al alloy single-crystal thin film preparation for basic magnetic measurements |
title_short |
Fe-Al alloy single-crystal thin film preparation for basic magnetic measurements |
title_full |
Fe-Al alloy single-crystal thin film preparation for basic magnetic measurements |
title_fullStr |
Fe-Al alloy single-crystal thin film preparation for basic magnetic measurements |
title_full_unstemmed |
Fe-Al alloy single-crystal thin film preparation for basic magnetic measurements |
title_sort |
fe-al alloy single-crystal thin film preparation for basic magnetic measurements |
publisher |
AIP Publishing LLC |
series |
AIP Advances |
issn |
2158-3226 |
publishDate |
2018-04-01 |
description |
Fe100–xAlx (x = 0, 4, 10, 20, 30 at. %) alloy films of 40 nm thickness are prepared on MgO(001) single-crystal substrates by varying substrate temperature from room temperature to 600 °C. Single-crystal films of (001) orientation with bcc-based disordered A2 structure are obtained for the Al content range of x = 0 - 20 at. %. An ordered phase of DO3 structure is observed in Fe70Al30 films prepared at temperatures higher than 200 °C, whereas (001) oriented single-crystal films of A2 structure are obtained when prepared at room temperature. The film surface profile does not depend much on the film composition, while the surface roughness increases with increasing substrate temperature. Island-like crystals are observed for films prepared at 600°C for all compositions. Difference in lattice spacing measured parallel and perpendicular to the substrate is noted for the single-crystal thin films and it increases with increasing Al content. The lattice strain in single-crystal film is caused possibly to accommodate the lattice mismatch with the MgO substrate. The (001)-oriented single-crystal films with A2 structure show four-fold symmetries in in-plane magnetic anisotropy with the easy magnetization axis A2[100] and the hard magnetization axis A2[110], whereas the films with DO3 ordered structure show almost isotropic magnetic properties. |
url |
http://dx.doi.org/10.1063/1.4991910 |
work_keys_str_mv |
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