| Paper Abstract and Keywords |
| Presentation |
2021-10-08 13:50
Current induced domain wall motion for magneto-optical light modulator with Gdx-Fe1-x magnetic nanowires.
Takuma Sotome (Tokai Univ.), Kenichi Aoshima (NHKstrl), Kazuto Hosaka (Tokyo Denki Univ.), Nobuhiko Funabashi, Ryo Higashida (NHKstrl), Yasunobu Akiyama (Tokai Univ.), Kenji Machida (NHKstrl) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
A magneto-optical light modulation element (MO element) using current-induced domain wall movement is composed of a nanomagnet (NM) and a Gd-Fe magnetic wire. An initial magnetic domain is generated on the Gd-Fe magnetic wire by NM. Optical modulation is performed by enlarging / reducing the initial magnetic domain with an electric current and reversing the magnetization. This time, we made a prototype MO element with different Gd-Fe composition (Gd24.5, Gd24.1%) and investigated the difference in domain wall movement characteristics. The MO element with Gd24.5% has a larger coercive force than the element with Gd24.1%, and the operating current is 1.1mA to 1.3mA, which is higher than the element with Gd24.1% (1.0mA), but the domain wall movement distance. Was large, and the region for optical modulation was 1.20μm, which was much larger than that of the device with Gd 24.1% (0.33μm). It was found that the Gd24.5% element can perform optical modulation in a larger area, which can greatly improve the optical utilization efficiency. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
Electron holography / current-driven domain wall movement / magneto-optical Kerr effect / / / / / |
| Reference Info. |
ITE Tech. Rep., vol. 45, no. 28, MMS2021-33, pp. 13-18, Oct. 2021. |
| Paper # |
MMS2021-33 |
| Date of Issue |
2021-10-01 (MMS) |
| ISSN |
Print edition: ISSN 1342-6893 Online edition: ISSN 2424-1970 |
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