Spin 1/2 Delafossite Honeycomb Compound Cu(5)SbO(6)

E Climent-Pascual, P Norby, NH Andersen, PW Stephens, HW Zandbergen, J Larsen, RJ Cava

    Research output: Contribution to journalArticleScientificpeer-review

    25 Citations (Scopus)

    Abstract

    Cu(5)SbO(6) is found to have a monoclinic, Delafossite-derived structure consisting of alternating layers of O-Cu(I)-O sticks and magnetic layers of Jahn Teller distorted Cu(II)O(6) octahedra in an edge sharing honeycomb arrangement with Sb(V)O(6) octahedra. This yields the structural formula Cu(I)(3)Cu(II)(2)Sb(V)O(6). Variants with ordered and disordered layer stacking are observed, depending on the synthesis conditions. The spin 1/2 Cu(2+) ions form dimers in the honeycomb layer. The magnetic susceptibility measured between 5 and 300 K is characteristic of the presence of a singlet-triplet spin gap of 189 K. High resolution synchrotron X-ray diffraction studies indicate that changes in the intra- or interdirner distances between 300 and 20 K, such as might indicate an increase in strength of the Peierls-like distortion through the spin gap temperature, if present, are very small. A comparison to the NaFeO(2)-type Cu(2+) honeycomb compounds Na(3)Cu(2)SbO(6) and Na(2)Cu(2)TeO(6) is presented.
    Original languageEnglish
    Pages (from-to)557-565
    Number of pages9
    JournalInorganic Chemistry Communications
    Volume51
    Issue number1
    DOIs
    Publication statusPublished - 2012

    Fingerprint Dive into the research topics of 'Spin 1/2 Delafossite Honeycomb Compound Cu(5)SbO(6)'. Together they form a unique fingerprint.

    Cite this