Nanodispersed DO(3)-phase nanostructures observed in magnetostrictive Fe-19% Ga Galfenol alloys

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Date
2008-03-10
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Publisher
American Physical Society
Abstract

Few nanometer large (<2 nm) inclusions of DO(3)-phase structure have been identified in the A2 matrix of highly magnetostrictive Fe-19% Ga alloys by high-resolution transmission electron microscopy (HRTEM). In addition, we have found that these nanostructures include a high density of {100} line defects with a Burgers vector of a(bcc)/2 < 100 >. This dispersion of DO(3)-phase nanostructures formed within the main A2 matrix and the lifting of their coherency by defects are consistent with a recent theory for the structure and properties of magnetostrictive Fe-Ga and Fe-Al alloys.

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Keywords
Short-range order, Fe-Ga, AL alloys, State, Phase, Physics
Citation
Bhattacharyya, Somnath ; Jinschek, J. R. ; Khachaturyan, A. ; et al., Mar 2008. "Nanodispersed DO(3)-phase nanostructures observed in magnetostrictive Fe-19% Ga Galfenol alloys," PHYSICAL REVIEW B 77(10): 104107. DOI: 10.1103/PhysRevB.77.104107