Magnetic x-ray powder diffraction from antiferromagnetic uranium dioxide

S P Collins, D Laundy, C C Tang, R J Cernik

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We report the first successful measurement of a magnetic x-ray powder diffraction (MXPD) peak from an antiferromagnet, obtained in this instance by exploiting the strong uranium M4 magnetic resonance in UO2. In the expt., the challenge has been to overcome the relative weakness of MXPD relative to high levels of fluorescence background radiation. The interpretation of our data as magnetic diffraction rests on three findings. First, the signal vanishes as the sample temp. is raised through the crit. temp., at which long-range order vanishes. Secondly, the diffraction intensities are shown to exhibit a pronounced resonance structure close to the U M4 edge. Lastly, the scattering cross-section is found to be in remarkably good agreement with a simple calcn. [on SciFinder(R)]
    Original languageEnglish
    Pages (from-to)L223-L229
    JournalJ. Phys. Condens. Matter
    Volume7
    Issue number16
    DOIs
    Publication statusPublished - 1995

    Keywords

    • Magnetooptical effect
    • X-ray (magnetic x-ray powder diffraction from antiferromagnetic uranium dioxide)
    • magnetic x ray diffraction uranium oxide

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