Perovskite BaCrO$_{3}$: completing a materials system with an anomalous Mott transition

ORAL

Abstract

Perovskite BaCrO$_{3}$ cannot be stabilized in bulk but we have synthesized this compound as a film. BaCrO$_{3}$ films have a substantially larger lattice constant than other chromates, are insulating, and exhibit weak ferromagnetism likely associated with canted antiferromagnetism. Comparison with the sister compounds CaCrO$_{3}$ and SrCrO$_{3}$ suggests an anomalous Mott transition caused by lattice expansion where magnetism is independent of whether the compound is metallic or insulating.

*Supported by the NSF through grant DMR-0907197.

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Authors

  • Z.H. Zhu

    • University of Connecticut

  • F.J. Rueckert

    • University of Connecticut

  • J.I. Budnick

    • University of Connecticut, Storrs, CT
    • University of Connecticut

  • W.A. Hines

    • University of Connecticut

  • M. Jain

    • University of Connecticut

  • H. Zhang

    • University of Connecticut

  • B.O. Wells

    • University of Connecticut, Storrs, CT
    • University of Connecticut