Magnetization reversal processes in exchange-biased systems

X. Portier*, A. K. Petford-Long, A. De Morais, N. W. Owen, H. Laidler, K. O'Grady

*Corresponding author for this work

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

The magnetization reversal mechanism in sputtered bilayer films of NiFe coupled to a range of antiferromagnets has been studied using Lorentz microscopy and magnetic measurements. The reversal mechanism on the forward and recoil loops appears different and the results have been interpreted in terms of a recently published seven-point model. Reversal is controlled by the magnetic domain structure in the antiferromagnet. Time-dependent studies show that the reversal field for the NiFe layer decreases for both the forward and recoil loops, as the time for which the film is held above the saturation field of the NiFe layer increases. This can be explained by viscous rotation of the magnetization in thermally activated domains in the antiferromagnetic layer.

Original languageEnglish (US)
Pages (from-to)6412-6414
Number of pages3
JournalJournal of Applied Physics
Volume87
Issue number9 III
StatePublished - May 1 2000

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Portier, X., Petford-Long, A. K., De Morais, A., Owen, N. W., Laidler, H., & O'Grady, K. (2000). Magnetization reversal processes in exchange-biased systems. Journal of Applied Physics, 87(9 III), 6412-6414.