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Paper Abstract and Keywords
Presentation 2018-10-18 13:00
[Invited Talk] Epsilon iron oxide: from synthesis to magnetic recording applications -- Novel functional metal oxide material from abundant elements --
Shin-ichi Ohkoshi, Asuka Namai, Marie Yoshikiyo (Univ. Tokyo) MRIS2018-14
Abstract (in Japanese) (See Japanese page) 
(in English) Epsilon iron oxide (ε-Fe2O3) is one of the polymorphs of Fe2O3, which exhibits a coercive field of 25 kOe, the largest value among metal oxide magnets. Epsilon iron oxide maintains its magnetic ordering even below the particle size of 10 nm, with a superparamagnetic limit of 7.5 nm. This is the smallest value among hard ferrites. From such magnetic feature, epsilon iron oxide is expected as a next-generation magnetic material for magnetic tapes, whose demand is increasing as an archiving medium in the big-data era. In this paper, the crystal structure, magnetic properties, and applications towards magnetic tape media will be introduced.
Keyword (in Japanese) (See Japanese page) 
(in English) ε-Fe2O3 / large coercive field / ferrite / nanomagnet / magnetic tape / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 255, MRIS2018-14, pp. 1-6, Oct. 2018.
Paper # MRIS2018-14 
Date of Issue 2018-10-11 (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 MRIS2018-14

Conference Information
Committee MRIS ITE-MMS  
Conference Date 2018-10-18 - 2018-10-19 
Place (in Japanese) (See Japanese page) 
Place (in English) Osaka University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Recording Head, Spintronics, etc. 
Paper Information
Registration To MRIS 
Conference Code 2018-10-MRIS-MMS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Epsilon iron oxide: from synthesis to magnetic recording applications 
Sub Title (in English) Novel functional metal oxide material from abundant elements 
Keyword(1) ε-Fe2O3  
Keyword(2) large coercive field  
Keyword(3) ferrite  
Keyword(4) nanomagnet  
Keyword(5) magnetic tape  
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Keyword(7)  
Keyword(8)  
1st Author's Name Shin-ichi Ohkoshi  
1st Author's Affiliation The University of Tokyo (Univ. Tokyo)
2nd Author's Name Asuka Namai  
2nd Author's Affiliation The University of Tokyo (Univ. Tokyo)
3rd Author's Name Marie Yoshikiyo  
3rd Author's Affiliation The University of Tokyo (Univ. Tokyo)
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Speaker Author-1 
Date Time 2018-10-18 13:00:00 
Presentation Time 50 minutes 
Registration for MRIS 
Paper # MRIS2018-14 
Volume (vol) vol.118 
Number (no) no.255 
Page pp.1-6 
#Pages 6 
Date of Issue 2018-10-11 (MRIS) 

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