Role of Nanoscale Precipitates on the Enhanced Magnetostriction of Heat-Treated Galfenol (Fe1-xGax) Alloys

被引：101

作者：

Cao, H. ^{[1
]}

Gehring, P. M. ^{[2
]}

Devreugd, C. P. ^{[1
]}

Rodriguez-Rivera, J. A. ^{[3
]}

Li, J. ^{[1
]}

Viehland, D. ^{[1
]}

机构：

[1] Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA

[2] NIST, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA

[3] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 12期

关键词：

FE-GA; MAGNETOELASTICITY;

D O I：

10.1103/PhysRevLett.102.127201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report neutron diffuse scattering measurements on highly magnetostrictive Fe1-xGax alloys (0.14 < x < 0.20) with different thermal treatments. This diffuse scattering scales with magnetostriction and exhibits asymmetric peaks at the (100) and (300) reciprocal lattice positions that are consistent with the coexistence of short-range ordered, coherent nanometer-scale precipitates embedded in a long-range ordered, body-centered cubic matrix. A large peak splitting is observed at (300) for x=0.19, which indicates that the nanoprecipitates are not cubic and have a large elastic strain. This implies a structural origin for the enhanced magnetostriction.

引用

页数：4

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