HAMR Recording Limitations and Extendibility

Author

Xiaobin Wang ; Kaizhong Gao ; Hua Zhou ; Itagi, A. ; Seigler, Mike ; Gage, Edward

Author_Institution

Seagate Technol., Bloomington, MN, USA

Volume

49

Issue

2

fYear

2013

fDate

Feb. 2013

Firstpage

686

Lastpage

692

Abstract

Heat-assisted magnetic recording (HAMR) limitations and extendibility are studied in light of the recent 1.0 Tb/in² technology demonstration. The paper examines HAMR specific technology challenges, including switching field distributions at elevated temperature, saturation noise, and near-field transducer (NFT) thermal spot-size limits. While current HAMR recording density ( ~ 1 Tb/in²) is limited by switching field distribution and thermal spot size, ultimate HAMR density (up to 5 Tb/in²) is determined by achievable recording-layer magnetic anisotropy and grain size.

Keywords

grain size; magnetic anisotropy; magnetic recording noise; magnetic switching; transducers; HAMR recording density; HAMR recording limitations; HAMR specific technology; elevated temperature; grain size; heat-assisted magnetic recording limitations; near-field transducer thermal spot-size limits; recording-layer magnetic anisotropy; saturation noise; switching field distributions; thermal spot size; Heat-assisted magnetic recording; Jitter; Magnetization; Media; Noise; Switches; Heat-assisted magnetic recording; near-field optics; saturation; switching field distribution; thermal spot size;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2012.2221689

Filename

6417006