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Paper Abstract and Keywords
Presentation 2016-07-08 13:25
Relationship between Lattice Strain and L10 Ordering in Epitaxial FePt Films
Masahiro Nakamura, Ryoma Ochiai (Chuo Univ.), Mitsuru Ohtake (Kogakuin Univ./Chuo Univ.), Masaaki Futamoto (Chuo Univ.), Fumiyoshi Kirino (Tokyo Univ. Arts), Nobuyuki Inaba (Yamagata Univ.) MR2016-14
Abstract (in Japanese) (See Japanese page) 
(in English) In order to apply FePt alloy thin film with L10 structure to magnetic recording media, etc., it is required to control the easy magnetization axis (c-axis) perpendicular to the surface. However, when a film with L10 structure is formed on a (001)-oriented underlayer or substrate, L10(100) and L10(010) variants whose c-axis lies in the film plane may coexist with the L10(001) variant with the c-axis perpendicular to the substrate surface. In order to control the c-axis perpendicular to the surface, it is effective to introduce tensile stress in lateral direction caused by lattice mismatch with the substrate. In the present study, FePt films of 10 nm thickness are prepared on various (001) oxide substrates with different lattice constants. The influences of lattice strain caused by lattice mismatch on the variant orientation and the order degree are investigated. In addition, the effects of cap-layer formed on FePt film are also studied. The results indicate that a larger lattice mismatch is effective in enhancing the growth and ordering of L10(001) variant, and the presence of cap-layer is useful in further promoting the tendency.
Keyword (in Japanese) (See Japanese page) 
(in English) FePt / thin film / L10 ordered structure / lattice strain / crystallographic orientation / epitaxial growth / single-crystal substrate /  
Reference Info. IEICE Tech. Rep., vol. 116, July 2016.
Paper #  
Date of Issue 2016-07-01 (MR) 
ISSN Print edition: ISSN 0913-5685    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 MR2016-14

Conference Information
Committee MRIS ITE-MMS  
Conference Date 2016-07-08 - 2016-07-08 
Place (in Japanese) (See Japanese page) 
Place (in English) Chuo Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Solid State Memory, Media, etc. 
Paper Information
Registration To MRIS 
Conference Code 2016-07-MR-MMS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Relationship between Lattice Strain and L10 Ordering in Epitaxial FePt Films 
Sub Title (in English)  
Keyword(1) FePt  
Keyword(2) thin film  
Keyword(3) L10 ordered structure  
Keyword(4) lattice strain  
Keyword(5) crystallographic orientation  
Keyword(6) epitaxial growth  
Keyword(7) single-crystal substrate  
Keyword(8)  
1st Author's Name Masahiro Nakamura  
1st Author's Affiliation Chuo University (Chuo Univ.)
2nd Author's Name Ryoma Ochiai  
2nd Author's Affiliation Chuo University (Chuo Univ.)
3rd Author's Name Mitsuru Ohtake  
3rd Author's Affiliation Kogakuin University/Chuo University (Kogakuin Univ./Chuo Univ.)
4th Author's Name Masaaki Futamoto  
4th Author's Affiliation Chuo University (Chuo Univ.)
5th Author's Name Fumiyoshi Kirino  
5th Author's Affiliation Tokyo University of the Arts (Tokyo Univ. Arts)
6th Author's Name Nobuyuki Inaba  
6th Author's Affiliation Yamagata University (Yamagata Univ.)
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Speaker Author-1 
Date Time 2016-07-08 13:25:00 
Presentation Time 25 minutes 
Registration for MRIS 
Paper # MR2016-14 
Volume (vol) vol.116 
Number (no) no.125 
Page pp.7-12 
#Pages 6 
Date of Issue 2016-07-01 (MR) 

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