X-ray diffuse scattering measurements of chemical short-range order and lattice strains in a highly magnetostrictive Fe0.813Ga0.187 alloy in an applied magnetic field

被引：18

作者：

Du, Y. ^{[1
]}

Huang, M. ^{[2
]}

Lograsso, T. A. ^{[3
]}

McQueeney, R. J. ^{[1
,3
]}

机构：

[1] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[2] S Dakota Sch Mines, Dept Mat & Met Engn, Rapid City, SD 57701 USA

[3] Ames Lab, Div Mat Sci & Engn, Ames, IA 50011 USA

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 21期

关键词：

FE-GA ALLOYS; STRUCTURALLY HETEROGENEOUS MODEL; EXTRINSIC MAGNETOSTRICTION;

D O I：

10.1103/PhysRevB.85.214437

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The rapid growth of the magnetostriction coefficient of ferromagnetic Fe1-xGax alloys that occurs at a composition range from 0 < x < 0.20 has recently been associated with the formation of nanoscale tetragonal precipitates close to an order-disorder transition. The structurally anisotropic precipitates are proposed to rotate in an applied magnetic field, thereby resulting in a large magnetoelastic response. X-ray diffuse scattering measurements sensitive to the atomic short-range ordering and lattice strain were performed on a quenched 18.7 at. % Ga alloy and show no dependence on the application of a magnetic field. This negative result sets limits on the role of nanoscale precipitates in magnetostriction.

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页数：6

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