Neutron scattering study of the antiferroquadrupolar structure and order parameter of UPd3

K.A. McEwen, U. Steigenberger, K.N. Clausen, Y.J. Bi, M.B. Walker, C. Kappler

    Research output: Contribution to journalJournal articleResearch

    Abstract

    UPd3 exhibits phase transitions at T-1 approximate to 7 K and T-2 approximate to 5 K. Polarised-neutron diffraction measurements showed that a structural modulation with wavevector (1/2, 0, 0) takes place below T-1. A more detailed neutron-diffraction study of this phase is reported: group-theory analysis of the results indicates that the ordered phase below T-1 is a triple-q antiferroquadrupolar structure involving Q(x2-y2), Q(xz) and Q(zz) quadrupole moments of the uranium ions.
    Original languageEnglish
    JournalPhysica B: Condensed Matter
    Volume213/214
    Pages (from-to)128-130
    ISSN0921-4526
    DOIs
    Publication statusPublished - 1995

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