A Mössbauer spectroscopy and neutron diffraction study of magnetostrictive, melt-spun Fe–Ga alloy ribbons

Mellors, NJ; Zhao, X; Simmons, LM; Quinn, CJ; Kilcoyne, SH

Abstract

Ribbons of Fe100−xGax (x=15, 17.5, 19.5 and 22.5) were prepared by rapid solidification from the melt. 57Fe Mössbauer spectroscopy and high resolution neutron diffraction have revealed that Fe100−xGax alloys with x=15 and 17.5 have the disordered bcc (A2) structure even after annealing, but the alloy with x=19.5 developed the short-range ordered D03 phase when annealed. The x=22.5 alloys showed mainly D03 phase with a fraction of bcc phase. A fraction of the bcc phase transformed into D03 phase and the long-range ordering of D03 phase was improved after annealing. 57Fe Mössbauer spectra showed no observable L12 phase in any samples even though less than 1% volume of L12 phases has been found in the annealed samples by neutron diffraction. The additional absorption at hyperfine field of 25 T in x=22.5 samples was regarded as a result of imperfect D03 structure, rather than L12 phase.

Citation

Mellors, N., Zhao, X., Simmons, L., Quinn, C., & Kilcoyne, S. (2012). A Mössbauer spectroscopy and neutron diffraction study of magnetostrictive, melt-spun Fe–Ga alloy ribbons. Journal of Magnetism and Magnetic Materials, 324(22), 3817-3823. https://doi.org/10.1016/j.jmmm.2012.06.021

• Journal Article Type: Article
• Online Publication Date: Jun 27, 2012
• Publication Date: Nov 1, 2012
• Deposit Date: Jul 24, 2012
• Journal: Journal of Magnetism and Magnetic Materials
• Print ISSN: 0304-8853
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 324
• Issue: 22
• Pages: 3817-3823
• DOI: https://doi.org/10.1016/j.jmmm.2012.06.021
• Keywords: Melt spun FeGa alloy; Magnetostrictive alloy; Mössbauer spectroscopy; Neutron diffraction; Short-range order;; Ferromagnetism
• Publisher URL: http://dx.doi.org/10.1016/j.jmmm.2012.06.021
• Related Public URLs: http://www.sciencedirect.com/science/journal/03048853/324/22