Magnetization reversal in the pinned layer of CoFe/PtMn bilayers

Y. G. Wang*, A. K. Petford-Long

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The magnetization reversal of the ferromagnetic (FM) layer in CoFe/PtMn exchange-coupled bilayer films has been investigated using bulk magnetometry. These films exhibit very complex angular dependence and the easy axis is perpendicular to the field applied during deposition and post-annealing. Holding the film at negative saturation of the FM layer for up to 17h results in no change in the exchange field. We believe that this is a thermally stable exchange-coupled system. Only limited thermal activation with a small time constant appears and no thermally activated reversal of the antiferromagnetic layer with a large time constant exits.

Original languageEnglish (US)
Pages (from-to)82-90
Number of pages9
JournalJournal of Magnetism and Magnetic Materials
Volume279
Issue number1
DOIs
StatePublished - Aug 1 2004

Keywords

  • CoFe/PtMn bilayer
  • Exchange coupling
  • Hysteresis
  • Magnetization reversal
  • Thermal activation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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