Fabrication of a high anisotropy nanoscale patterned magnetic recording medium for data storage applications

Vishal Parekh, E. Chunsheng, Darren Smith, Ariel Ruiz, John C. Wolfe, Paul Ruchhoeft, Erik Svedberg, Sakhrat Khizroev, Dmitri Litvinov

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

An approach to fabrication of a patterned magnetic recording medium for next generation data storage systems is presented. (Co/Pd)n magnetic multilayers are evaluated as candidates for patterned medium materials for their high and easily controllable magnetic anisotropy. The multilayer films deposited on a Ta seed layer enable high intergranular exchange coupling - an essential feature of a patterned magnetic recording medium. The quality of (Co/Pd)n superlattices was optimized via deposition conditions and monitored using low-angle x-ray diffraction. An estimated in-plane (hard-axis) magnetization saturation field in excess of 40 000Oe was observed. Vertical (easy-axis) hysteresis loops for as-deposited continuous magnetic multilayers exhibited a low coercivity of 930Oe, indicating highly uniform (magnetically) films with weak domain wall pinning. Ion-beam proximity lithography was used to pattern magnetic multilayers into 43nm islands on a 135nm pitch. Following patterning, easy-axis coercivity increased nearly 15-fold to 12.7 kOe.

Original languageEnglish (US)
Pages (from-to)2079-2082
Number of pages4
JournalNanotechnology
Volume17
Issue number9
DOIs
StatePublished - May 14 2006

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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