| Presentation | 2019-12-06 Information Stability in Heat-Assisted Magnetic Recording Tadashi Kobayashi, Yoshinobu Nakatani, Yuji Fujiwara, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(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) |
| Keyword(in English) | thermal stability factor / anisotropy constant ratio / bit error rate / error probability / attempt frequency |
| Paper # | MRIS2019-44 |
| Date of Issue | 2019-11-28 (MRIS) |
| Conference Information | |
| Committee | MRIS / ITE-MMS |
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| Conference Date | 2019/12/5(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Ehime University |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Signal Processing and Others |
| Chair | Satoshi Matsunuma(Maxell) / Norihiko Ishii(NHK) |
| Vice Chair | |
| Secretary | (Toshiba) / (Kinki Univ.) |
| Assistant | Ikuya Tagawa(Tohoku Inst. of Tech.) / Hiroko Arai(AIST) |
| Paper Information | |
| Registration To | Technical Committee on Magnetic Recording & Information Storage / Technical Group on Multi-media Storage |
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| Language | JPN |
| 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 |
| 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.) |
| Date | 2019-12-06 |
| Paper # | MRIS2019-44 |
| Volume (vol) | vol.119 |
| Number (no) | MRIS-326 |
| Page | pp.pp.41-46(MRIS), |
| #Pages | 6 |
| Date of Issue | 2019-11-28 (MRIS) |