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Paper Abstract and Keywords
Presentation 2019-12-05 14:50
Micromagnetic analysis of MAMR recording head -- A consideration for stable oscillation of STO at low applied current density --
Ryo Itagaki, Yasushi Kanai (NIIT), Simon Greaves (Tohoku Univ.) MRIS2019-41
Abstract (in Japanese) (See Japanese page) 
(in English) A micromagnetic model analysis of STOs was carried out to realize stable STO oscillation with small J. Using write heads with a tilted and parallel, 20 nm MP – TS gap we investigated STO oscillation as a function of 1) STO tilt angle with respect to recording media surface and 2) Gilbert damping factor α of the write head. We found 1) Gilbert damping factor α of the write head, especially in the main pole – trailing shield (MP – TS) gap region, greatly affected the STO oscillation. 2) STO oscillated stably in a parallel MP – TS gap. 3) STO/gap tilt angle of 15° seemed good. 4) Injected current density to STO of J = 3×10^8 A/cm^2 was enough, compared with J = 6×10^8 A/cm^2 in our previous models.
Keyword (in Japanese) (See Japanese page) 
(in English) Microwave-Assisted Magnetic Recording (MAMR) / Spin Torque Oscillator (STO) / Write Heads / Micromagnetic Simulation / / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 326, MRIS2019-41, pp. 13-18, Dec. 2019.
Paper # MRIS2019-41 
Date of Issue 2019-11-28 (MRIS) 
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 MRIS2019-41

Conference Information
Committee MRIS ITE-MMS  
Conference Date 2019-12-05 - 2019-12-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Ehime University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Signal Processing and Others 
Paper Information
Registration To MRIS 
Conference Code 2019-12-MRIS-MMS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Micromagnetic analysis of MAMR recording head 
Sub Title (in English) A consideration for stable oscillation of STO at low applied current density 
Keyword(1) Microwave-Assisted Magnetic Recording (MAMR)  
Keyword(2) Spin Torque Oscillator (STO)  
Keyword(3) Write Heads  
Keyword(4) Micromagnetic Simulation  
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1st Author's Name Ryo Itagaki  
1st Author's Affiliation Niigata Institute of Technology (NIIT)
2nd Author's Name Yasushi Kanai  
2nd Author's Affiliation Niigata Institute of Technology (NIIT)
3rd Author's Name Simon Greaves  
3rd Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2019-12-05 14:50:00 
Presentation Time 25 minutes 
Registration for MRIS 
Paper # MRIS2019-41 
Volume (vol) vol.119 
Number (no) no.326 
Page pp.13-18 
#Pages 6 
Date of Issue 2019-11-28 (MRIS) 

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