Effect of Reader Sensitivity Rotation in TDMR with Head Skew

R. Suzuto, Y. Nakamura, H. Osawa, Y. Okamoto, Y. Kanai, H. Muraoka

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


The 2-D magnetic recording (TDMR) by shingled magnetic recording (SMR) draws attention as a technology to increase the recording densities in a hard disk drive. The magnetization pattern is curved by the write field at the corner of the writer in SMR, and the information to read/write (R/W) channel performance is feared. Therefore, it is possible that the bit error rate performance is improved by fitting the reader sensitivity to the bit shape. In this paper, we evaluate the effect of reader sensitivity rotation in the TDMR R/W channel with head skew under a specification of 4 Tb/in2 by computer simulation, applying the low-density parity-check coding and the iterative decoding system with the 2-D finite impulse response filter. The results show that the rotated reader sensitivity fits the recorded bit magnetization shape, and the error-free skew range increases to-3°∼ 6°. Therefore, the reader sensitivity rotation is considered to be an effective way to improve the skew margin in the TDMR system.

Original languageEnglish
Article number7414518
JournalIEEE Transactions on Magnetics
Issue number7
Publication statusPublished - 2016 Jul


  • Reader sensitivity rotation
  • Shingled magnetic recording (SMR)
  • Two-dimensional magnetic recording (TDMR)

ASJC Scopus subject areas

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


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