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

TitleX-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
Publication TypeJournal Article
Year of Publication2012
AuthorsDu Y, Huang M, Lograsso TA, McQueeney RJ
Journal TitlePhysical Review B
Volume85
Pages214437
Date Published06
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000305782800002
Keywordsextrinsic, fe-ga alloys, magnetostriction, STRUCTURALLY HETEROGENEOUS MODEL
Abstract

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.

URL<Go to ISI>://WOS:000305782800002
DOI10.1103/PhysRevB.85.214437
Alternate JournalPhys. Rev. B