L12 phase formation and giant exchange anisotropy in Mn3Ir/Co-Fe bilayers
L12 phase formation and giant exchange anisotropy in Mn3Ir/Co-Fe bilayers
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DOI：
10.1016/j.jmmm.2006.02.007
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发表时间：
2006-09-01
影响因子：
2.7
通讯作者：
Takahashi, M
中科院分区：
文献类型：
--
作者：
Tsunoda, M;Imakita, K;Takahashi, M
针对不同的 Mn-Ir 层化学成分、底层材料和底层厚度，研究了 Mn-Ir 层的 S 有序度和 Mn-Ir/Co-Fe 双层的交换各向异性。研究发现：(1)形成L1(2)相Mn3Ir的成分范围为22-32at％Ir，在此范围内获得了巨大的交换各向异性。 (2)Ru作为底层材料是有利的，以避免在高温衬底上沉积期间与Mn-Ir层相互扩散。 (3)底层厚度可以减少到5 nm，同时保持超过1 erg/cm(2)的巨大交换各向异性。 (C) 2006 Elsevier B.V. 保留所有权利。
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.