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Neutron diffraction studies of magnetostrictive Fe–Ga alloy ribbons

Zhao, Xuegen, Mellors, Nigel, Kilcoyne, Susan H., Lord, Don, Lupu, Nicoletta, Chiriac, Horia and Henry, Paul (2008) Neutron diffraction studies of magnetostrictive Fe–Ga alloy ribbons. Journal of Applied Physics, 103 (7). pp. 1-3. ISSN 0021-8979

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    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.

    Item Type: Article
    Subjects: Q Science > QC Physics
    Schools: School of Applied Sciences
    Related URLs:
    Depositing User: Sue Kilcoyne
    Date Deposited: 06 Dec 2011 10:58
    Last Modified: 20 Jun 2013 11:55


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