Electrical and magnetic properties of Nb2O5-δ crystallographic shear structures

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

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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-δ. Electrical conductivities increase with increasing reduction: Nb12O29 is a metallic conductor down to 0.3 K. All show, surprisingly, Curie-Weiss behavior in the χ-vs-T curves, with Nb12O29 ordering antiferromagnetically at 12 K.

Original languageEnglish (US)
Pages (from-to)6973-6981
Number of pages9
JournalPhysical Review B
Volume44
Issue number13
DOIs
StatePublished - Jan 1 1991
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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    Cava, R. J., Batlogg, B., Krajewski, J. J., Poulsen, H. F., Gammel, P., Peck, W. F., & Rupp, L. W. (1991). Electrical and magnetic properties of Nb2O5-δ crystallographic shear structures. Physical Review B, 44(13), 6973-6981. https://doi.org/10.1103/PhysRevB.44.6973