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Paper Abstract and Keywords
Presentation 2019-12-06 09:15
Information Stability in Heat-Assisted Magnetic Recording
Tadashi Kobayashi (Mie Univ.), Yoshinobu Nakatani (UEC), Yuji Fujiwara (Mie Univ.)
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 / / /  
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Conference Information
Committee IEICE-MRIS 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 IEICE-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  
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 IEICE-MRIS 
Paper #  
Volume (vol) vol.43 
Number (no)  
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