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Paper Abstract and Keywords
Presentation 2009-12-11 10:00
Effect of Cross-Track-Direction Grooves of a SUL on Magnetization Transitions
Kinya Fudano (NEC Software Tohoku/Tohoku Univ.), Yoshihisa Nakamura (Iwate Prefectural Univ./Tohoku Univ.), Kiyoshi Yamakawa (AIT/Tohoku Univ.), Hiroaki Muraoka (Tohoku Univ.) Link to ES Tech. Rep. Archives: MR2009-46
Abstract (in Japanese) (See Japanese page) 
(in English) A high head field gradient is the most crucial criterion for a write head. A new approach with a grooved soft magnetic underlayer (SUL) structure was investigated for use with a single-pole planar writer. Cross-track grooves on the SUL surface improved the writing field gradient without degrading the field strength. In this study, a detailed analysis of the head field distributions and writing process with the heads and medium were performed using a finite-element method (FEM) computer simulation. The simulator was combined with a Stoner-Wohlfarth magnetization reversal model, in which head-medium magnetic interactions were incorporated by calculating the head and medium magnetization together as a ‘self-consistent’ system, designated as "SMART". A maximum gradient greater than 1000 Oe/nm was confirmed with the grooved SUL structure and the recorded magnetization distribution for the high gradient writing head field was calculated.
Keyword (in Japanese) (See Japanese page) 
(in English) perpendicular magnetic recording / FEM simulation / shielded planar writer / SUL / head-medium magneto-static interaction / self-consistent calculation / curling mode / magnetic recording simulator  
Reference Info. IEICE Tech. Rep., vol. 109, Dec. 2009.
Paper #  
Date of Issue 2009-12-03 (MR) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)

Conference Information
Committee ITE-MMS MRIS  
Conference Date 2009-12-10 - 2009-12-11 
Place (in Japanese) (See Japanese page) 
Place (in English) Ehime Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MRIS 
Conference Code 2009-12-MMS-MR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Effect of Cross-Track-Direction Grooves of a SUL on Magnetization Transitions 
Sub Title (in English)  
Keyword(1) perpendicular magnetic recording  
Keyword(2) FEM simulation  
Keyword(3) shielded planar writer  
Keyword(4) SUL  
Keyword(5) head-medium magneto-static interaction  
Keyword(6) self-consistent calculation  
Keyword(7) curling mode  
Keyword(8) magnetic recording simulator  
1st Author's Name Kinya Fudano  
1st Author's Affiliation NEC Software Tohoku, Ltd./RIEC, Tohoku University (NEC Software Tohoku/Tohoku Univ.)
2nd Author's Name Yoshihisa Nakamura  
2nd Author's Affiliation Iwate Prefectural University/RIEC, Tohoku University (Iwate Prefectural Univ./Tohoku Univ.)
3rd Author's Name Kiyoshi Yamakawa  
3rd Author's Affiliation Akita R&D Center/RIEC, Tohoku University (AIT/Tohoku Univ.)
4th Author's Name Hiroaki Muraoka  
4th Author's Affiliation RIEC, Tohoku University (Tohoku Univ.)
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Date Time 2009-12-11 10:00:00 
Presentation Time 30 
Registration for MRIS 
Paper # IEICE-MR2009-46 
Volume (vol) IEICE-109 
Number (no) no.328 
Page pp.67-72 
#Pages IEICE-6 
Date of Issue IEICE-MR-2009-12-03 

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