TY - JOUR
T1 - Transition response characteristics of heat-assisted magnetic recording and their performance with MTR codes
AU - Radhakrishnan, Rathnakumar
AU - Erden, M. Fatih
AU - Ching, He
AU - Vasic, Bane
N1 - Funding Information:
This work was supported in part by the U.S. Department of Commerce, by the National Institute of Standards and Technology, by the Advanced Technology Program, and by the Co-operative agreement 70NANB1H3051 performed as part of the INSIC HAMR ATP program.
PY - 2007/6
Y1 - 2007/6
N2 - The response of a heat-assisted magnetic recording (HAMR) system is very sensitive to the laser spot position. The response is determined by transition characteristics like the center, curvature, and length. In this paper, by using the thermal Williams-Comstock model and the microtrack model, the effects of laser spot position on transition characteristics are investigated for both longitudinal and perpendicular recording from a read channel systems perspective. The general trend in their variation is determined and used to explain the resultant change in response. By simulation, we determine the post-Viterbi dominant error events for longitudinal HAMR system. Finally, we apply the well-known MTR codes to mitigate such errors and present their bit-error performance.
AB - The response of a heat-assisted magnetic recording (HAMR) system is very sensitive to the laser spot position. The response is determined by transition characteristics like the center, curvature, and length. In this paper, by using the thermal Williams-Comstock model and the microtrack model, the effects of laser spot position on transition characteristics are investigated for both longitudinal and perpendicular recording from a read channel systems perspective. The general trend in their variation is determined and used to explain the resultant change in response. By simulation, we determine the post-Viterbi dominant error events for longitudinal HAMR system. Finally, we apply the well-known MTR codes to mitigate such errors and present their bit-error performance.
KW - Heat-assisted magnetic recording (HAMR)
KW - Transition location
KW - Transition parameter
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U2 - 10.1109/TMAG.2007.892334
DO - 10.1109/TMAG.2007.892334
M3 - Article
AN - SCOPUS:34249101838
SN - 0018-9464
VL - 43
SP - 2298
EP - 2300
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 6
ER -