Spin-wave and critical neutron scattering from chromium

Jens Aage Als-Nielsen, J.D. Axe, G. Shirane

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    Abstract

    Chromium and its dilute alloys are unique examples of magnetism caused by itinerant electrons. The magnetic excitations have been studied by inelastic neutron scattering using a high-resolution triple-axis spectrometer. Spin-wave peaks in q scans at constant energy transfer ℏω could, in general, not be clearly resolved at any temperature below TN but it is still possible to deduce the slope ω/q of the dispersion curve and also to estimate the spin-wave lifetimes. The scattering displays a divergence as q→0, ω→0, T→TN characteristic of critical fluctuations. The critical scattering is confined to small values of q, but the ω range is very wide compared to critical scattering from systems with localized magnetic moments
    Original languageEnglish
    JournalJournal of Applied Physics
    Volume42
    Issue number4
    Pages (from-to)1666-1671
    ISSN0021-8979
    DOIs
    Publication statusPublished - 1971

    Cite this

    Als-Nielsen, J. A., Axe, J. D., & Shirane, G. (1971). Spin-wave and critical neutron scattering from chromium. Journal of Applied Physics, 42(4), 1666-1671. https://doi.org/10.1063/1.1660389