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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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Conference Information
Committee IEICE-MRIS MMS  
Conference Date 2021-10-08 - 2021-10-08 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Recording Head, Spintronics, Solid State Memory, Media, etc. 
Paper Information
Registration To MMS 
Conference Code 2021-10-MRIS-MMS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Current induced domain wall motion for magneto-optical light modulator with Gdx-Fe1-x magnetic nanowires. 
Sub Title (in English)  
Keyword(1) Electron holography  
Keyword(2) current-driven domain wall movement  
Keyword(3) magneto-optical Kerr effect  
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1st Author's Name Takuma Sotome  
1st Author's Affiliation Tokai University (Tokai Univ.)
2nd Author's Name Kenichi Aoshima  
2nd Author's Affiliation NHK Science and Technology Research Laboratories (NHKstrl)
3rd Author's Name Kazuto Hosaka  
3rd Author's Affiliation Tokyo Denki University (Tokyo Denki Univ.)
4th Author's Name Nobuhiko Funabashi  
4th Author's Affiliation NHK Science and Technology Research Laboratories (NHKstrl)
5th Author's Name Ryo Higashida  
5th Author's Affiliation NHK Science and Technology Research Laboratories (NHKstrl)
6th Author's Name Yasunobu Akiyama  
6th Author's Affiliation Tokai University (Tokai Univ.)
7th Author's Name Kenji Machida  
7th Author's Affiliation NHK Science and Technology Research Laboratories (NHKstrl)
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Speaker
Date Time 2021-10-08 13:50:00 
Presentation Time 25 
Registration for MMS 
Paper # ITE-MMS2021-33 
Volume (vol) ITE-45 
Number (no) no.28 
Page pp.13-18 
#Pages ITE-6 
Date of Issue ITE-MMS-2021-10-01 


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