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Paper Abstract and Keywords
Presentation 2015-10-22 13:55
Detection of the spin current assisted effect using the giant magneto-resistance effect
Mao Takahashi, Yukio Nozaki (Keio Univ.) MR2015-16
Abstract (in Japanese) (See Japanese page) 
(in English) We demonstrate a reduction of coercive field in Ni_81 Fe_19 films using a spin transfer torque generated by a spin pumping effect. When a microwave field resonates one of the ferromagnetic layer of a pseudo spin valve consisting of Ni_81 Fe_19 100 nm / Cu 10 nm / Ni_81 Fe_19 10 nm trilayer, a spin current is generated by the spin pumping effect. The spin current is injected to another ferromagnetic layer and the subsequent spin transfer torque can modulate the coercive field of the ferromagnetic layer. The coercive fields of two ferromagnetic layers are measured using the giant magneto-resistance (GMR) effect as a function of microwave frequency. From the frequency dependence of the coercive field, it is confirmed that the coercive field of Ni_81 Fe_19 10 nm layer becomes minimum at the frequency where a ferromagnetic resonance is excited in another Ni_81 Fe_19 100 nm layer. This is the clear evidence that the spin transfer torque generated by the spin pumping effect can assist the magnetization reversal of ferromagnetic thin film in the spin valve structure.
Keyword (in Japanese) (See Japanese page) 
(in English) Spin current / Spin pumping / Spin transfer torque / / / / /  
Reference Info. IEICE Tech. Rep., vol. 115, Oct. 2015.
Paper #  
Date of Issue 2015-10-15 (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)
Notes on Review This article is a technical report without peer review, and its polished version will be published elsewhere.
Download PDF MR2015-16

Conference Information
Committee MRIS ITE-MMS  
Conference Date 2015-10-22 - 2015-10-23 
Place (in Japanese) (See Japanese page) 
Place (in English) Osaka Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Recording Head, Spintronics, etc 
Paper Information
Registration To MRIS 
Conference Code 2015-10-MR-MMS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Detection of the spin current assisted effect using the giant magneto-resistance effect 
Sub Title (in English)  
Keyword(1) Spin current  
Keyword(2) Spin pumping  
Keyword(3) Spin transfer torque  
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1st Author's Name Mao Takahashi  
1st Author's Affiliation Keio University (Keio Univ.)
2nd Author's Name Yukio Nozaki  
2nd Author's Affiliation Keio University (Keio Univ.)
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Speaker Author-1 
Date Time 2015-10-22 13:55:00 
Presentation Time 25 minutes 
Registration for MRIS 
Paper # MR2015-16 
Volume (vol) vol.115 
Number (no) no.263 
Page pp.7-10 
#Pages 4 
Date of Issue 2015-10-15 (MR) 

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