Magnetostriction and Magnetic Heterogeneities in Iron-Gallium

Mark Laver, C. Mudivarthi, J.R. Cullen, A.B. Flatau, W.-C. Chen, S.M. Watson, M. Wuttig

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    Abstract

    Iron-gallium alloys Fe1-xGax exhibit an exceptional increase in magnetostriction with gallium content. We present small-angle neutron scattering investigations on a Fe0.81Ga0.19 single crystal. We uncover heterogeneities with an average spacing of 15 nm and with magnetizations distinct from the matrix. The moments in and around the heterogeneities are observed to reorient with an applied magnetic field or mechanical strain. We discuss the possible roles played by nanoscale magnetic heterogeneities in the mechanism for magnetostriction in this material. © 2010 The American Physical Society
    Original languageEnglish
    JournalPhysical Review Letters
    Volume105
    Issue number2
    Pages (from-to)027202
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2010

    Bibliographical note

    Copyright 2010 by the American Physical Society

    Keywords

    • Materials and energy storage
    • Superconducting materials

    Cite this

    Laver, M., Mudivarthi, C., Cullen, J. R., Flatau, A. B., Chen, W-C., Watson, S. M., & Wuttig, M. (2010). Magnetostriction and Magnetic Heterogeneities in Iron-Gallium. Physical Review Letters, 105(2), 027202. https://doi.org/10.1103/PhysRevLett.105.027202