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Paper Abstract and Keywords
Presentation 2009-06-12 09:00
Analysis of track-edge noise from viewpoint of write heads with different dimensions
Yosuke Urakami, Naoto Ito, Hiroyuki Katada, Masato Shiimoto, Sarbanoo Das, Mitsuhiro Hashimoto, Mikito Sugiyama, Kazuhiro Nakamoto (Hitachi Ltd.) MR2009-7 Link to ES Tech. Rep. Archives: MR2009-7
Abstract (in Japanese) (See Japanese page) 
(in English) Track-edge noise, which is one of the major hindrances in achieving the narrow track recording, was studied through the spinstandtesting and the micromagnetics simulations. Three heads with different write pole widths were carefully chosen in the experiments so that their on-track head field gradients were almost similar, and the recording performance of these heads was evaluated with an identical narrow read head. Despite of their similar on-track field gradients, the narrowest write head exhibited significantly a low signal-to-noise ratio (SNR) at the track center. The reason for this is that the skirt of the reader sensitivity function contributed to an increase in noise even when the reader was at the center of the track. This experimentally observed track-edge noise effect on the ontrack SNR was also confirmed through the micromagnetics simulations. The simulation results revealed that increasing the cross-track head field gradient effectively reducing the track-edge noise. A wraparound shield head is one of the promising candidates for narrow track recording because of its high cross-track head filed gradient.
Keyword (in Japanese) (See Japanese page) 
(in English) track-edge noise / perpendicular magnetic recording / track density / head field gradient / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, June 2009.
Paper #  
Date of Issue 2009-06-04 (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 MR2009-7 Link to ES Tech. Rep. Archives: MR2009-7

Conference Information
Committee ITE-MMS MRIS  
Conference Date 2009-06-11 - 2009-06-12 
Place (in Japanese) (See Japanese page) 
Place (in English) RIEC Tohoku Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MRIS 
Conference Code 2009-06-MMS-MR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Analysis of track-edge noise from viewpoint of write heads with different dimensions 
Sub Title (in English)  
Keyword(1) track-edge noise  
Keyword(2) perpendicular magnetic recording  
Keyword(3) track density  
Keyword(4) head field gradient  
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1st Author's Name Yosuke Urakami  
1st Author's Affiliation Central Research, Hitachi Ltd. (Hitachi Ltd.)
2nd Author's Name Naoto Ito  
2nd Author's Affiliation Central Research, Hitachi Ltd. (Hitachi Ltd.)
3rd Author's Name Hiroyuki Katada  
3rd Author's Affiliation Central Research, Hitachi Ltd. (Hitachi Ltd.)
4th Author's Name Masato Shiimoto  
4th Author's Affiliation Central Research, Hitachi Ltd. (Hitachi Ltd.)
5th Author's Name Sarbanoo Das  
5th Author's Affiliation Central Research, Hitachi Ltd. (Hitachi Ltd.)
6th Author's Name Mitsuhiro Hashimoto  
6th Author's Affiliation Central Research, Hitachi Ltd. (Hitachi Ltd.)
7th Author's Name Mikito Sugiyama  
7th Author's Affiliation Central Research, Hitachi Ltd. (Hitachi Ltd.)
8th Author's Name Kazuhiro Nakamoto  
8th Author's Affiliation Central Research, Hitachi Ltd. (Hitachi Ltd.)
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Speaker Author-1 
Date Time 2009-06-12 09:00:00 
Presentation Time 30 minutes 
Registration for MRIS 
Paper # MR2009-7 
Volume (vol) vol.109 
Number (no) no.80 
Page pp.33-37 
#Pages
Date of Issue 2009-06-04 (MR) 


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