High-temperature magnetic correlations in the 2D S=1/2 antiferromagnet copper formate tetradeuterate

H.M. Rønnow, D.F. McMorrow, A. Harrison

    Research output: Contribution to journalJournal articleResearch

    Abstract

    The temperature dependence of the structure factor S(k) of the instantaneous magnetic fluctuations in copper formate tetradeuterate has been investigated using neutron scattering techniques. Our data extend to unprecedently high temperatures (T similar to J) compared to the 2D exchange coupling. The correlation length xi and amplitude S-0 are in good agreement with the predictions for a 2D S = 1/2 Heisenberg antiferromagnet on a square lattice.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume82
    Issue number15
    Pages (from-to)3152-3155
    ISSN0031-9007
    DOIs
    Publication statusPublished - 1999

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