Neutron diffraction studies of magnetostrictive Fe–Ga alloy ribbons

Zhao, X; Mellors, NJ; Kilcoyne, SH; Lord, DG; Lupu, N; Horia, C; Henry, P

Abstract

Melt-spun Fe–Ga ribbons were prepared and some ribbons were annealed at 1000 °C for 1 h then
slowly cooled to room temperature. X-ray diffraction patterns revealed no evidence of texture and
only bcc phase in the as-quenched ribbons. However, high-resolution neutron diffraction patterns
gave more information on the structure of these ribbons. Only diffractions from the disordered bcc
A2 phase were found in as-quenched ribbons with 15, 17.5, and 19.5 at. % Ga content, without any
trace of satellite peaks or splitting peaks from the proposed Ga–Ga pairing superlattice structure.
The broadening of the base of the �110� peaks for all samples except the as-quenched 15 at. % Ga
ribbon might indicate the existence of some kind of short range ordering. Ribbons developed L12
phase after annealing especially in the Fe 19.5 at. % Ga ribbon where the formation of L12 phase
reduced the Ga content in the remaining A2 phase and decreased its lattice parameter dramatically.
D03 phase formed in the as-quenched 22.5 at. % Ga ribbon and the following annealing treatment
transformed more A2 phase into D03 phase.

Citation

Zhao, X., Mellors, N., Kilcoyne, S., Lord, D., Lupu, N., Horia, C., & Henry, P. (2008). Neutron diffraction studies of magnetostrictive Fe–Ga alloy ribbons. Journal of Applied Physics, 103(07B32), https://doi.org/10.1063/1.2837244

• Journal Article Type: Article
• Publication Date: Feb 1, 2008
• Deposit Date: Mar 20, 2012
• Publicly Available Date: Apr 5, 2016
• Journal: Journal of Applied Physics
• Print ISSN: 0021-8979
• Publisher: AIP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 103
• Issue: 07B32
• DOI: https://doi.org/10.1063/1.2837244
• Publisher URL: http://dx.doi.org/10.1063/1.2837244