Exchange bias energy in Co/Pt/IrMn multilayers with perpendicular and in-plane anisotropy

M. Czapkiewicz*, T. Stobiecki, R. Rak, M. Zoła̧dź, S. van Dijken

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

The magnetization reversal process in perpendicularly biased [Pt / Co]3 / dPt Pt/IrMn and in-plane biased Co / dPt Pt/IrMn multilayers with 0 nm ≤ dPt ≤ 1.2 nm was investigated using Kerr magnetometry and Kerr microscopy. For the system with in-plane magnetic anisotropy, the exchange bias field decreases monotonically with Pt insertion layer thickness, while its coercivity remains constant. The samples with perpendicular magnetic anisotropy, on the other hand, exhibit maximum exchange bias and minimum coercivity for dPt = 0.1 nm. In both cases, the existence of large exchange bias fields correlates with a high domain density during magnetization reversal. The interface exchange coupling energy is larger for the in-plane biased films than for the perpendicularly biased multilayers.

Original languageEnglish
Pages (from-to)151-154
Number of pages4
JournalJournal of Magnetism and Magnetic Materials
Volume316
Issue number2
DOIs
Publication statusPublished - Sep 2007
MoE publication typeA1 Journal article-refereed

Keywords

  • Domain patterns
  • Exchange bias
  • Perpendicular anisotropy

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