Patterned media with composite in-plane and perpendicular anisotropy recording layers

R. Sbiaa, S. N. Piramanayagam

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Magnetization reversal mechanism in nanostructures composed of exchange coupled bi-layers with in-plane and perpendicular anisotropy was investigated. Micromagnetic simulation was carried out for bit-patterned media with areal density of 5 Tb/in2, as example. Magnetization of thermally stable recorded bit using a single layer may not switch under write field. However, a complete and fast switching is possible with an exchange coupling to a layer with in-plane anisotropy. By adjusting the thicknesses and intrinsic properties of the two layers, the composite recording layer still can retain perpendicular anisotropy. The exchange coupled structure with dual-anisotropy can be extended to magnetic memories.

Original languageEnglish
Pages (from-to)3963-3966
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume321
Issue number23
DOIs
Publication statusPublished - Dec 2009

Keywords

  • Bit-patterned media
  • Exchange coupling
  • magnetic nanostructures
  • magnetization reversal

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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