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

Published

Author(s)

H Cao, Peter M. Gehring, Christopher Devreugd, Jose Rodriguez Rivera, D. Viehland

Abstract

We report neutron diffuse scattering measurements on highly magnetostrictive Fe1-xxGax 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.
Citation
Physical Review Letters
Volume
102

Keywords

diffuse scattering, galfenol, magnetostriction, neutron scattering

Citation

Cao, H. , Gehring, P. , Devreugd, C. , Rodriguez Rivera, J. and Viehland, D. (2009), Role of Nanoscale Precipitates on the Enhanced Magnetostriction of Heat-Treated Galfenol (Fe<sub>1-x</sub>Ga^dx) Alloys, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=610005 (Accessed February 28, 2024)
Created March 24, 2009, Updated October 12, 2021