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| Presentation | 2019-12-06 09:15 Information Stability in Heat-Assisted Magnetic Recording Tadashi Kobayashi (Mie Univ.), Yoshinobu Nakatani (UEC), Yuji Fujiwara (Mie Univ.)  MRIS2019-44 Link to ES Tech. Rep. Archives: MRIS2019-44 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | The thermal stability factor KumVm/kT and the anisotropy constant ratio Ku/Kbulk necessary for 10 years of archiving in heat-assisted magnetic recording of 2 Tbpsi are evaluated by employing a bit error rate calculation using a grain error probability P. Although the attempt frequency f0 in P is a function of the Gilbert damping constant, the Curie temperature, Ku/Kbulk, the grain volume, and temperature, f0 can be treated as a constant for this calculation. The Gilbert damping constant and the Curie temperature variation are parameters with little impact for the information stability. On the other hand, the grain size variation, the grain number per bit n, the mean Curie temperature Tcm, and the storage temperature T are parameters with a strong impact for the information stability. Although KumVm/kT decreases as n increases due to a statistical problem, a larger Ku/Kbulk is necessary as n increases due to a smaller grain size. A larger Ku/Kbulk is also necessary as Tcm decreases. The bit error rate increases rapidly as T increases. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | thermal stability factor / anisotropy constant ratio / bit error rate / error probability / attempt frequency / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 119, no. 326, MRIS2019-44, pp. 41-46, Dec. 2019. | |
| Paper # | MRIS2019-44 | |
| 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 | MRIS2019-44 Link to ES Tech. Rep. Archives: MRIS2019-44 |
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| 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) | Information Stability in Heat-Assisted Magnetic Recording |
| Sub Title (in English) | |
| Keyword(1) | thermal stability factor |
| Keyword(2) | anisotropy constant ratio |
| Keyword(3) | bit error rate |
| Keyword(4) | error probability |
| Keyword(5) | attempt frequency |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Tadashi Kobayashi |
| 1st Author's Affiliation | Mie University (Mie Univ.) |
| 2nd Author's Name | Yoshinobu Nakatani |
| 2nd Author's Affiliation | University of Electro-Communications (UEC) |
| 3rd Author's Name | Yuji Fujiwara |
| 3rd Author's Affiliation | Mie University (Mie Univ.) |
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| Speaker | Author-1 |
| Date Time | 2019-12-06 09:15:00 |
| Presentation Time | 25 minutes |
| Registration for | MRIS |
| Paper # | MRIS2019-44 |
| Volume (vol) | vol.119 |
| Number (no) | no.326 |
| Page | pp.41-46 |
| #Pages | 6 |
| Date of Issue | 2019-11-28 (MRIS) |
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