Electrical and magnetic properties of Nb2O5-γ crystallographic shear structures

R.J. Cava, B. Batlogg, J.J. Krajewski, H.F. Poulsen, P. Gammel, W.F. Peck Jr., L.W. Rupp Jr.

    Research output: Contribution to journalJournal articleResearch

    Abstract

    The reduced niobium oxides Nb25O62, Nb47O116, Nb22O54, and Nb12O29 have been prepared in pure polycrystalline form by a niobium-metal gettering technique. They are related to the high niobia parent structure through the action of cystallographic shear to accommodate oxygen deficiency in Nb2O5-delta. Electrical conductivities increase with increasing reduction: Nb12O29 is a metallic conductor down to 0.3 K. All show, surprisingly, Curie-Weiss behavior in the chi-vs-T curves, with Nb12O29 ordering antiferromagnetically at 12 K.
    Original languageEnglish
    JournalPhysical Review B
    Volume44
    Issue number13
    Pages (from-to)6973-6981
    ISSN2469-9950
    DOIs
    Publication statusPublished - 1991

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