Elasticity and magnetoelasticity of Fe-Ga solid solutions
Elasticity and magnetoelasticity of Fe-Ga solid solutions
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DOI：
10.1063/1.1450045
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发表时间：
2002-02-18
影响因子：
4
通讯作者：
Cullen, J
中科院分区：
文献类型：
--
作者：
Wuttig, M;Dai, LY;Cullen, J
bcc Fe-Ga固溶体剪切弹性常数的连续波测量表明，常数C-44与镓成分无关，而常数1/2（C-11-C-12）线性减小，并在26 at处外推为零。% Ga。这一结果表明，Fe-Ga固溶体是不均匀的，含有由马氏体相胚胎组成的团簇。1/2（C-11-C-12）的柔软度增加反映了胚密度的增加。假设团簇以次近的Ga对为中心的模型再现了已知的组成依赖于组成范围为0的磁致伸缩常数lambda（100）
Continuous-wave measurements of the shear elastic constants of bcc Fe-Ga solid solutions show that the constant C-44 is independent of the gallium composition while the constant 1/2(C-11-C-12) decreases linearly and extrapolates to zero at 26 at. % Ga. This result indicates that the Fe-Ga solid solution is inhomogeneous and contains clusters consisting of embryos of a martensitic phase. The increasing softness of 1/2(C-11-C-12) then reflects an increase of the embryo density. A model assuming that the clusters are centered around next-nearest Ga pairs reproduces the known composition dependence of the magnetostrictive constant lambda(100) in the composition range 0