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Paper Abstract and Keywords
Presentation 2009-07-16 16:35
Improvement of granular perpendicular magnetic recording media with Si/NiFe/FeCoB crystalline SUL
Shunsuke Gomi, Kenichiro Hirata, Toshimitsu Matsuu (TITech), Satoshi Matsunuma, Tetsutaro Inoue, Toshiyuki Watanabe, Tsugihiro Doi (Hitachi Maxell), Shigeki Nakagawa (TITech) MR2009-20
Abstract (in Japanese) (See Japanese page) 
(in English) Application of crystalline soft magnetic underlayer(SUL) for reduction of the Ru intermediate layer(IML) between recording layer and SUL in perpendicular magnetic recording media has been performed. The use of FeCoB layer as crystalline SUL improves degree of FeCo(110) orientation, and that gives degree of (001) orientation of Ru IML and CoPtCr in CoPtCr-SiO2 recording layer. Then, FeCoB crystalline SULs with seed layer of Ru or Si/NiFe are fabricated and compared to control degree of (110) orientation of FeCo in FeCoB layer. Ru/FeCoB SUL has high anisotropy field. Si/NiFe seed layer improves (110) preferential orientation of FeCo. Si/NiFe seed layer more improved (110) orientation of FeCo than that of Ru. It was confirmed that the use of Ru/FeCoB layer or Si/NiFe/FeCoB layer causes improvement of (001) orientation of Ru IML, which causes improvement of (001) orientation of CoPtCr. The intensity of (002) diffraction peak of CoPtCr is almost constant even though the thickness of Ru IML changes from 30 nm to 1 nm. Coercivity and squareness ratio of recording layer maintained the same value in spite of reducing the thickness of the Ru IML from 30 nm to 5 nm.
Keyword (in Japanese) (See Japanese page) 
(in English) Perpendicular magnetic recording media / Crystalline soft magnetic underlayer / Ru intermediate layer / (110) orientation of bcc-FeCo / (001) orientation of hcp-Ru / / /  
Reference Info. IEICE Tech. Rep., vol. 109, July 2009.
Paper #  
Date of Issue 2009-07-09 (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 MR2009-20

Conference Information
Committee MRIS ITE-MMS  
Conference Date 2009-07-16 - 2009-07-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Inst. of Tech. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MRIS 
Conference Code 2009-07-MR-MMS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improvement of granular perpendicular magnetic recording media with Si/NiFe/FeCoB crystalline SUL 
Sub Title (in English)  
Keyword(1) Perpendicular magnetic recording media  
Keyword(2) Crystalline soft magnetic underlayer  
Keyword(3) Ru intermediate layer  
Keyword(4) (110) orientation of bcc-FeCo  
Keyword(5) (001) orientation of hcp-Ru  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Shunsuke Gomi  
1st Author's Affiliation Tokyo Institute of Technology (TITech)
2nd Author's Name Kenichiro Hirata  
2nd Author's Affiliation Tokyo Institute of Technology (TITech)
3rd Author's Name Toshimitsu Matsuu  
3rd Author's Affiliation Tokyo Institute of Technology (TITech)
4th Author's Name Satoshi Matsunuma  
4th Author's Affiliation Hitachi Maxell (Hitachi Maxell)
5th Author's Name Tetsutaro Inoue  
5th Author's Affiliation Hitachi Maxell (Hitachi Maxell)
6th Author's Name Toshiyuki Watanabe  
6th Author's Affiliation Hitachi Maxell (Hitachi Maxell)
7th Author's Name Tsugihiro Doi  
7th Author's Affiliation Hitachi Maxell (Hitachi Maxell)
8th Author's Name Shigeki Nakagawa  
8th Author's Affiliation Tokyo Institute of Technology (TITech)
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Speaker Author-1 
Date Time 2009-07-16 16:35:00 
Presentation Time 25 minutes 
Registration for MRIS 
Paper # MR2009-20 
Volume (vol) vol.109 
Number (no) no.132 
Page pp.41-45 
#Pages 5 
Date of Issue 2009-07-09 (MR) 

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