Presentation 2018-12-07
Writing Field Sensitivity in Heat-Assisted Magnetic Recording
Tadashi Kobayashi, Yoshinobu Nakatani, Yuji Fujiwara,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) Work on increasing writing field sensitivity can be divided into five problems in heat-assisted magnetic recording (HAMR). Although the coercivity can be reduced by any amount during writing in HAMR, a higher writing field is necessary for a higher anisotropy constant ratio, namely, for a higher coercivity. When the damping constant is 0.1, writing is easy. A writing field of about 8 kOe is necessary if we are to realize 4 Tbpsi and a linear velocity of 10 m/s. On the other hand, when the damping constant is 0.01, writing is difficult. We need a writing field of about 12 kOe to achieve 2 Tbpsi and a linear velocity of 5 m/s. If there is a Curie temperature variation, a higher writing field and a higher thermal gradient are necessary.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) write-error / erasure-after-write / statistical problem / damping constant / Curie temperature variation
Paper # MRIS2018-24
Date of Issue 2018-11-29 (MRIS)

Conference Information
Committee MRIS / ITE-MMS
Conference Date 2018/12/6(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
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Writing Field Sensitivity in Heat-Assisted Magnetic Recording
Sub Title (in English)
Keyword(1) write-error
Keyword(2) erasure-after-write
Keyword(3) statistical problem
Keyword(4) damping constant
Keyword(5) Curie temperature variation
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 2018-12-07
Paper # MRIS2018-24
Volume (vol) vol.118
Number (no) MRIS-347
Page pp.pp.35-40(MRIS),
#Pages 6
Date of Issue 2018-11-29 (MRIS)