Patterned soft underlayers for perpendicular media

Y. Hijazi, R. Ikkawi, N. Amos, A. Lavrenov, D. Doria, N. Joshi, R. Chomko, S. Khizroev

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Perpendicular recording may be the most viable, near future, replacement for the longitudinal core technology in ultrahigh-density magnetic disk storage. Central to this mode of recording is a soft underlayer (SUL) which facilitates flux flow between writer poles, and is responsible for an effective increase in recording field. However, there are controversies concerning the effectiveness and limitations of using soft underlayers; among which are readback noise and inadequate switching torque. Patterned SUL is proposed as a new and viable approach to SUL limitations in perpendicular media, with improved system performance. Numerical models have been developed using commercially available FEM and BEM software suites (ANSYS and Ampere) to demonstrate key advantages of patterned SUL in perpendicular media.

Original languageEnglish (US)
Pages (from-to)2375-2377
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number10
StatePublished - Oct 2006


  • Patterned media
  • patterned SUL
  • perpendicular recording
  • soft underlayer

ASJC Scopus subject areas

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


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