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Presentation 2021-10-08 13:25
γ' Phase Formation and Magnetostriction in Fe-N Thin Films
Yura Maeda, Kosuke Imamura, Mitsuru Ohtake, Tetsuroh Kawai, Masaaki Futamoto (Yokohama Nat. Univ.), Fumiyoshi Kirino (Tokyo Univ. Arts), Nobuyuki Inaba (Yamagata Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Fe-N thin films are prepared on MgO single-crystal substrates by reactive sputtering. The influence of substrate temperature on the γ'-Fe4N phase formation is investigated. Furthermore, the magnetostriction coefficients, λ100 and λ111, of γ' phase are experimentally determined. A poly-crystalline film composed of γ' and α" phases is formed when the substrate temperature is RT. The film prepared at 200 °C involves γ' epitaxial crystal in addition to γ' poly-crystal, whereas that prepared at 400 °C consists of only γ' single-crystal. However when the substrate temperature increases up to 600 °C, a single-crystal film composed of α phase is formed. A moderate substrate temperature of about 400 °C is effective in the formation of γ' single-crystal film. The γ' single-crystal film shows a large positive λ100 value of –75×10–6 and a large negative λ111 value of +220×10–6. The present study has shown that γ'-Fe4N phase is one of the strong candidates for future rare-metal free magnetostrictive materials.
Keyword (in Japanese) (See Japanese page) 
(in English) γ'-Fe4N phase / Single-Crystal Thin Film / Large Magnetostriction / / / / /  
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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 IEICE-MRIS 
Conference Code 2021-10-MRIS-MMS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) γ' Phase Formation and Magnetostriction in Fe-N Thin Films 
Sub Title (in English)  
Keyword(1) γ'-Fe4N phase  
Keyword(2) Single-Crystal Thin Film  
Keyword(3) Large Magnetostriction  
1st Author's Name Yura Maeda  
1st Author's Affiliation Yokohama National University (Yokohama Nat. Univ.)
2nd Author's Name Kosuke Imamura  
2nd Author's Affiliation Yokohama National University (Yokohama Nat. Univ.)
3rd Author's Name Mitsuru Ohtake  
3rd Author's Affiliation Yokohama National University (Yokohama Nat. Univ.)
4th Author's Name Tetsuroh Kawai  
4th Author's Affiliation Yokohama National University (Yokohama Nat. Univ.)
5th Author's Name Masaaki Futamoto  
5th Author's Affiliation Yokohama National University (Yokohama Nat. Univ.)
6th Author's Name Fumiyoshi Kirino  
6th Author's Affiliation Tokyo University of the Arts (Tokyo Univ. Arts)
7th Author's Name Nobuyuki Inaba  
7th Author's Affiliation Yamagata University (Yamagata Univ.)
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Speaker Author-1 
Date Time 2021-10-08 13:25:00 
Presentation Time 25 minutes 
Registration for IEICE-MRIS 
Paper #  
Volume (vol) vol.45 
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