Effect of porosity on the effective magnetostriction of polycrystals
Effect of porosity on the effective magnetostriction of polycrystals
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DOI：
10.1063/1.373664
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发表时间：
2000-06
影响因子：
3.2
通讯作者：
C. Nan;Yong Huang;G. Weng
中科院分区：
文献类型：
--
作者：
C. Nan;Yong Huang;G. Weng
Explicit relations for determining the effective magnetostriction of polycrystals with cubic magnetostrictive crystallites and pores are derived based on the Green’s function technique. For comparison, two extreme approximations-the Reuss and Voigt-type approximations-are also given. To illustrate the technique, the influence of porosity on the effective saturation magnetostriction of common magnetostrictive metals (Fe and Ni), giant magnetostrictive alloy terfenol-D, and Fe–Co spinel are illustrated. The theoretical estimates show an interesting nonmonotonic concentration dependence of magnetostrictive behavior of the polycrystals with such magnetostrictive microcrystallites as Ni and Fe–Co spinel, whose magnetic easy axes are 〈100〉 axes rather than 〈111〉 axes.
