Areal density limits for perpendicular magnetic recording

R. H. Victora, Jianhua Xue, Mohammed Patwari

Research output: Contribution to journalConference articlepeer-review

85 Scopus citations


A strategy for high-density perpendicular magnetic recording with a soft underlayer is introduced. The approach is based on three concepts: 1) the nonzero magnetic susceptibility of the recording layer; 2) the use of intergranular exchange to partially cancel magnetostatic effects; and 3) a novel head architecture. Micromagnetic simulations involving recording head, soft underlayer, and recording layer are employed to specify a particularly advantageous design. It is shown that the expected density approaches 1 Tbit/in2.

Original languageEnglish (US)
Pages (from-to)1886-1891
Number of pages6
JournalIEEE Transactions on Magnetics
Issue number5 I
StatePublished - Sep 2002
Event2002 International Magnetics Conference (Intermag 2002) - Amsterdam, Netherlands
Duration: Apr 28 2002May 2 2002

Bibliographical note

Funding Information:
Manuscript received February 14, 2002. This work was supported in part by Seagate, Singapore, the National Storage Industry Consortium, and the National Science Foundation under Contract DMR-9971573. The authors are with the Department of Electrical and Computer Engineering, Center for Micromagnetics and Information Technologies, University of Minnesota, Minneapolis, MN 55455 USA (e-mail: Digital Object Identifier 10.1109/TMAG.2002.802791.


  • High-density perpendicular recording
  • Intergranular exchange
  • Micromagnetics
  • Permeability


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