L12 phase formation and giant exchange anisotropy in Mn3Ir/Co-Fe bilayers

Masakiyo Tsunoda, Ken ichi Imakita, Mamiko Naka, Migaku Takahashi

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43 Citations (Scopus)


The degree of order S of Mn-Ir layers and the exchange anisotropy of Mn-Ir/Co-Fe bilayers were investigated for various chemical compositions of Mn-Ir layers, underlayer materials, and underlayer thicknesses. It was found that: (1) The compositional range over which L12-phase Mn3Ir could be formed is 22-32 at% Ir and giant exchange anisotropy is obtained in this range. (2) Ru is favorable as an underlayer material for avoiding interdiffusion with the Mn-Ir layer during deposition on the temperature elevated substrate. (3) The underlayer thickness could be reduced to 5 nm while maintaining a giant exchange anisotropy in excess of 1 erg/cm2.

Original languageEnglish
Pages (from-to)55-59
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Issue number1
Publication statusPublished - 2006 Sept


  • Antiferromagnet
  • Exchange anisotropy
  • Exchange bias
  • Ordered alloy


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