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Paper Abstract and Keywords
Presentation 2010-12-10 09:30
[Invited Talk] Study on the damping constant of magnetic thin film using a coplanar waveguide (CPW)-ferromagnetic resonance (FMR) measurement method
Yasushi Endo, Yoshio Mitsuzuka, Kohei Okawa, Yutaka Shimada, Masahiro Yamaguchi (Tohoku Univ.) MR2010-49
Abstract (in Japanese) (See Japanese page) 
(in English) This paper reports the study on the damping constants (α) of NixFe1-x (0.65<x<0.86) and (Ni-Fe)1-yMy (M=Pt, Au, Pd, Cr; 0<y<0.15) films on glass substrate using a CPW-FMR measurement, and discusses the effect of saturation magnetostriction (λs) on α in these films in detail. In the case of NixFe1-x films, α slightly decreases for 0.67 < x < 0.78, and then increases for 0.78 < x < 0.85, resulting in a minimum α at x=0.78. λs monotonically decreases from positive value to negative one with increasing x, and is zero near x=0.81. In the case of (Ni-Fe)1-yMy films, both α and |λs| linearly increases with increasing y. Furthermore, the increments of α and the absolute value of λs (|λs|) to y are markedly enhanced in the order of M = Pt, Au, Pd, and Cr suggesting that 5d transition metal dopants are more influential on both α and λs than 3d and 4d transition metal dopants due to the strong spin-orbit interaction. Based on these results, it is speculated that the dominant factor of α in NixFe1-x and (Ni-Fe)1-xMx films is the magnetoelastic energy (Eσ). These results also demonstrate that α can be controlled effectively through the change in Eσ by transition metal dopants.
Keyword (in Japanese) (See Japanese page) 
(in English) CPW-FMR measurement / Ni-Fe films / Damping constant (α) / Saturation magnetostriction（λs） / Transition metal dopants / / /  
Reference Info. IEICE Tech. Rep., vol. 110, Dec. 2010.
Paper #  
Date of Issue 2010-12-02 (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 MR2010-49

Conference Information
Committee ITE-MMS MRIS  
Conference Date 2010-12-09 - 2010-12-10 
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 2010-12-MMS-MR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on the damping constant of magnetic thin film using a coplanar waveguide (CPW)-ferromagnetic resonance (FMR) measurement method 
Sub Title (in English)  
Keyword(1) CPW-FMR measurement  
Keyword(2) Ni-Fe films  
Keyword(3) Damping constant (α)  
Keyword(4) Saturation magnetostriction（λs）  
Keyword(5) Transition metal dopants  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Yasushi Endo  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Yoshio Mitsuzuka  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
3rd Author's Name Kohei Okawa  
3rd Author's Affiliation Tohoku University (Tohoku Univ.)
4th Author's Name Yutaka Shimada  
4th Author's Affiliation Tohoku University (Tohoku Univ.)
5th Author's Name Masahiro Yamaguchi  
5th Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2010-12-10 09:30:00 
Presentation Time 45 minutes 
Registration for MRIS 
Paper # MR2010-49 
Volume (vol) vol.110 
Number (no) no.329 
Page pp.51-58 
#Pages 8 
Date of Issue 2010-12-02 (MR) 

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