Short range ordering in Fe–Ge and Fe–Ga single crystals
Short range ordering in Fe–Ge and Fe–Ga single crystals
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DOI：
10.1063/1.3254249
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发表时间：
2009-10
影响因子：
4
通讯作者：
M. Huang;T. Lograsso
中科院分区：
文献类型：
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作者：
M. Huang;T. Lograsso
我们报告了通过 x 射线 θ-2θ 扫描确定的慢冷 (100) 和 (111) Fe81.6Ga18.4 和 Fe81Ge9 单晶中短程有序 (SRO) 的性质。 Ga原子的SRO至少具有一些D03特征。相比之下，Ge 原子仅在短程有序中表现出 B2 化学有序对称性。有人提出，SRO 中的 D03 特性对于提高铁基合金的磁弹性很重要；然而，Fe-Ge 合金中 B2 特征的存在表明 SRO 对于增加磁致伸缩并不是最重要的。
We report on the nature of short range ordering (SRO) in slow cooled (100) and (111) Fe81.6Ga18.4 and Fe81Ge9 single crystals determined by x-ray θ-2θ scans. The SRO of the Ga atoms has at least some D03 character. In contrast Ge atoms only exhibit B2 chemical ordering symmetries in the short range order. It has been proposed that the D03 character in the SRO is important for the enhancement in magnetoelasticity in Fe-based alloys; however the presence of B2 character in Fe–Ge alloys suggest that the SRO is not of primary importance in increasing the magnetostriction.