Transition response characteristics of heat-assisted magnetic recording and their performance with MTR codes

Rathnakumar Radhakrishnan, M. Fatih Erden, He Ching, Bane Vasic

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)2298-2300
Number of pages3
JournalIEEE Transactions on Magnetics
Volume43
Issue number6
DOIs
StatePublished - Jun 2007

Keywords

  • Heat-assisted magnetic recording (HAMR)
  • Transition location
  • Transition parameter

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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