High-Density Shingled Heat-Assisted Recording Using Bit-Patterned Media Subject to Track Misregistration

Aneesh Venugopal, Ali Ghoreyeshi, R. H. Victora

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Shingled recording employing bit-patterned media when used in conjunction with heat-assisted magnetic recording can significantly enhance the recording density. This paper investigates writing of dots that are not directly under the laser pulse. Such a shifted scheme of writing allows higher densities when used with shingled recording. A further increase in the recording density can be obtained by using composite structures, comprising a superparamagnetic writing layer, and a (doped) FePt storage layer. Effect of head velocity, Curie temperature variation, track mis-registration, and dot position jitter on the standard deviation of switching distribution is studied to evaluate the designs that offer data densities as high as 16 Tbpsi.

Original languageEnglish (US)
Article number7904603
JournalIEEE Transactions on Magnetics
Volume53
Issue number11
DOIs
StatePublished - Nov 2017

Bibliographical note

Funding Information:
ACKNOWLEDGMENT The authors would like to thank S. Wang for valuable discussions. This work was supported by IDEMA/ASTC.

Keywords

  • Bit-patterned media (BPM)
  • composite media
  • heat-assisted magnetic recording (HAMR)
  • shingled recording
  • switching distribution

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