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HAMR Recording Limitations and Extendibility

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6 Author(s)
Xiaobin Wang ; Seagate Technology,, Bloomington,, MN, USA ; Kaizhong Gao ; Hua Zhou ; Amit Itagi
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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.

Published in:

IEEE Transactions on Magnetics  (Volume:49 ,  Issue: 2 )