Correlation between the exchange bias and the degree of ordering of antiferromagnetic layer in PtMn/Co-Fe bilayers

Takashi Sato, Masakiyo Tsunoda, Migaku Takahashi

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Correlation between the unidirectional anisotropy constant, JK, and the degree of ordering of PtMn layer was investigated for Pt55Mn45/Co90Fe10 bilayer, as a function of the annealing time and the PtMn layer thickness, dAF. As a result, we found the linear relations between JK and the degree of ordering, fFCT·S, in the cases of the bilayers with dAF = 5-50 nm. From the extrapolation of the linear relations to fFCT·S = 1, meaning the perfect ordering of PtMn layer, we obtained the attainable value of JK and the intrinsic critical thickness of the PtMn layer to be 0.26 erg/cm2 and 6 nm, respectively.

Original languageEnglish
Pages (from-to)277-279
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume240
Issue number1-3
DOIs
Publication statusPublished - 2002 Feb 1

Keywords

  • Degree of order
  • Exchange anisotropy
  • GID
  • Order alloy
  • Spin valve

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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