Large moments in bcc FexCoyMnz ternary alloy thin films
Large moments in bcc FexCoyMnz ternary alloy thin films
复制标题
bcc FexCoyMnz 三元合金薄膜中的大矩
DOI：
10.1063/1.5006347
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发表时间：
2018
影响因子：
4
通讯作者：
Y. Idzerda
中科院分区：
文献类型：
--
作者：
R. Snow;H. Bhatkar;A. N’Diaye;E. Arenholz;Y. Idzerda
测量了MgO（001）衬底上生长的10-20 nm厚单晶bcc（bct）FexCoyMnz薄膜的元素磁矩和平均原子磁矩随组成变化的关系。薄膜外延稳定的体心立方结构的80%的可用三元组成的空间相比，只有23%的稳定区域的散装。显示铁磁性的膜代表60%的可用成分的可能性相比，25%的散装。体心立方结构的Fe_9 Co_（62）Mn_（29）薄膜的最大平均原子矩为3.25 ± 0.3 μB/atom（远高于Slater-Pauling二元合金曲线的极限值2.45 μB/atom）。表现出高磁矩的FexCoyMnz三元合金只能合成为非晶薄膜，因为对于这些组合物，体心立方结构在本体中不稳定。
The elemental magnetic moments and the average atomic moment of 10–20 nm thick single crystal bcc (bct) FexCoyMnz films deposited on MgO(001) have been determined as a function of a broad range of compositions. Thin film epitaxy stabilized the bcc structure for 80% of the available ternary compositional space compared to only a 23% stability region for the bulk. The films that display ferromagnetism represent 60% of the available compositional possibilities compared to 25% for the bulk. A maximum average atomic moment of 3.25 ± 0.3 μB/atom was observed for a bcc Fe9Co62Mn29 film (well above the limit of the Slater-Pauling binary alloy curve of 2.45 μB/atom). The FexCoyMnz ternary alloys that exhibit high moments can only be synthesized as ultrathin films since the bcc structure is not stable in the bulk for those compositions.