Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 304, Issue 1, Pages 55-59Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2006.02.007
Keywords
exchange bias; exchange anisotropy; ordered alloy; antiferromagnet
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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 L1(2)-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/cm(2). (C) 2006 Elsevier B.V. All rights reserved.
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