Physics of perpendicular recording with a patterned soft underlayer

Sakhrat Khizroev, Yazan Hijazi, Nissim Amos, Esnick Felissaint, Nikhil Joshi, R. Ikkawi, Roman Chomko, Dmitri Litvinov

Research output: Contribution to journalReview articlepeer-review

6 Scopus citations


In this paper, it is argued that perpendicular recording in the most popular current form-with the use of a continuous soft underlayer (SUL)-may not be the most optimal way to maximize the achievable areal density. As a possible solution, patterning of SUL is discussed. The purpose of patterning of a SUL is to effectively move the image head closer to the recording media, as compared to the real recording head, and thus increase the net recording field and the field gradient across the thickness of the media. Various patterning configurations and combinations with recording layers are comparatively studied. It is illustrated that with a patterned SUL, the recording and sensitivity fields, responsible for writing and reading information, respectively, could be not only increased by several factors but also localized across the entire thickness of the recording media.

Original languageEnglish (US)
Pages (from-to)243-254
Number of pages12
JournalJournal of Nanoscience and Nanotechnology
Issue number1
StatePublished - Jan 2007


  • 3-D Magnetic Memory
  • 3-D Magnetic Recording
  • Multi-Level Magnetic Memory
  • Perpendicular Recording
  • Soft Underlayer

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics


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