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Paper Abstract and Keywords
Presentation 2020-10-05 14:45
Evaluation of perpendicular magnetic anisotropy in Co2FeSi/MgO bilayers
Eisuke Matsushita, Yota Takamura, Yoshiya Stutler, Shigeki Nakagawa (Tokyo Tech) MRIS2020-4
Abstract (in Japanese) (See Japanese page) 
(in English) We investigated the origin of perpendicular magnetic anisotropy in full-Heusler alloy Co_2FeSi(CFS)/MgO bilayers in which CFS is expected as half-metallic ferromagnets. From analysis of CFS-thickness dependence of magnetic properties, the perpendicular magnetic anisotropy constant of the bulk contribution was found to be positive in a wide range of CFS-thickness from 0.4 nm to 1.4 nm and was drastically increased in less than 0.7 nm. The cross-sectional structures of these samples were observed by a scanning transmission electron microscope. Crystalized CFS layers were observed even in ultrathin film region. However, no significant difference was not observed in around 0.7 nm. Surprisingly, the atomic distance for out-of-plane direction was much larger in 1.4 nm thick CFS layer compared to calculated value based on the expected epitaxial relationship. In addition, the interdiffusion of Si was confirmed from CFS layers to buffer layers, suggesting non-stoichiometric composition of CFS layers.
Keyword (in Japanese) (See Japanese page) 
(in English) Full-Heusler alloy / Half-metallic ferromagnet / Perpendicular magnetic anisotropy / Interfacial magnetic anisotropy / Scanning transmission electron microscope / Investigation of microstructure / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 180, MRIS2020-4, pp. 16-19, Oct. 2020.
Paper # MRIS2020-4 
Date of Issue 2020-09-28 (MRIS) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF MRIS2020-4

Conference Information
Committee MRIS ITE-MMS  
Conference Date 2020-10-05 - 2020-10-05 
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 MRIS 
Conference Code 2020-10-MRIS-MMS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluation of perpendicular magnetic anisotropy in Co2FeSi/MgO bilayers 
Sub Title (in English)  
Keyword(1) Full-Heusler alloy  
Keyword(2) Half-metallic ferromagnet  
Keyword(3) Perpendicular magnetic anisotropy  
Keyword(4) Interfacial magnetic anisotropy  
Keyword(5) Scanning transmission electron microscope  
Keyword(6) Investigation of microstructure  
Keyword(7)  
Keyword(8)  
1st Author's Name Eisuke Matsushita  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
2nd Author's Name Yota Takamura  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
3rd Author's Name Yoshiya Stutler  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
4th Author's Name Shigeki Nakagawa  
4th Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
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Speaker Author-1 
Date Time 2020-10-05 14:45:00 
Presentation Time 25 minutes 
Registration for MRIS 
Paper # MRIS2020-4 
Volume (vol) vol.120 
Number (no) no.180 
Page pp.16-19 
#Pages 4 
Date of Issue 2020-09-28 (MRIS) 

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