Paper Abstract and Keywords |
Presentation |
2018-12-07 11:00
Recording characteristics of microwave-assisted magnetic recording for granular media Terumitsu Tanaka (Kyushu Univ.), Yasushi Kanai (Niigata Ins. Tech.), Kimihide Matsuyama (Kyushu Univ.) MRIS2018-26 Link to ES Tech. Rep. Archives: MRIS2018-26 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Magnetization reversal process under the microwave assistance and microwave-assisted signal recording characteristics were numerically estimated assuming granular type exchange coupled composite media. Magnetization curves under the microwave fields become narrower when microwave frequency is high, resulting in low coercivity due to the microwave assistance for both the monolayer and exchange coupled composite media. When the microwave frequency exceeds a particular frequency, the hysteresis curves showed the extra step and the saturation field increases and is comparable to that without microwave assistance, which attributes to unstable magnetization precessions under the microwave fields. Coherency of the magnetization reversal were numerically characterized to estimate thermal stability for the media. Exchange coupled composite media with relatively soft magnetic layer showed incoherent reversal under the DC field. On the other hand the nudged elastic band calculation revealed that coherent rotation follows the minimum energy path when DC field is absent and estimated minimum energy barrier height were thermally stable at the room temperature. Signal recording simulation presented that microwave field induces ferromagnetic resonance at the soft layer and enhances writability, and then the signal to noise ratio increases. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Microwave-assisted magnetic recording / ECC media / Micromagnetic simulation / / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 118, no. 347, MRIS2018-26, pp. 47-52, Dec. 2018. |
Paper # |
MRIS2018-26 |
Date of Issue |
2018-11-29 (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 |
MRIS2018-26 Link to ES Tech. Rep. Archives: MRIS2018-26 |
Conference Information |
Committee |
MRIS ITE-MMS |
Conference Date |
2018-12-06 - 2018-12-07 |
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 |
2018-12-MRIS-MMS |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
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(See Japanese page) |
Title (in English) |
Recording characteristics of microwave-assisted magnetic recording for granular media |
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Microwave-assisted magnetic recording |
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ECC media |
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Micromagnetic simulation |
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1st Author's Name |
Terumitsu Tanaka |
1st Author's Affiliation |
Kyushu University (Kyushu Univ.) |
2nd Author's Name |
Yasushi Kanai |
2nd Author's Affiliation |
Niigata Institute of Technology (Niigata Ins. Tech.) |
3rd Author's Name |
Kimihide Matsuyama |
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Kyushu University (Kyushu Univ.) |
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Speaker |
Author-1 |
Date Time |
2018-12-07 11:00:00 |
Presentation Time |
30 minutes |
Registration for |
MRIS |
Paper # |
MRIS2018-26 |
Volume (vol) |
vol.118 |
Number (no) |
no.347 |
Page |
pp.47-52 |
#Pages |
6 |
Date of Issue |
2018-11-29 (MRIS) |