Anomalous magnetic ground state behaviour of the mixed B-site pyrochlore Dy<sub>2</sub>ScNbO<sub>7</sub>

ORAL

Abstract

The spin ice state, which is of great interest due to observed residual pauling entropy, has been observed in rare-earth pyrochlores such as Dy2Ti2O7, and Dy2Sn2O7. In an effort to explore the robustness of the spin ice state in dysprosium based pyrochlores, a new species Dy2ScNbO7 has been synthesized and single crystals have successfully been grown. Early physical characterization has shown unique behaviour arising from the disordered b-site, with faster spin dynamics and an anomalous low ordering temperature. In an effort to further explore the unique behaviour of Dy2ScNbO7, heat capacity measurements have been performed with an applied magnetic field along the [111] kagomé ice plane and the [110] direction of the cubic unit cell. The phase diagrams constructed from these measurements and other recent physical characterization results show an unexpected divergence from spin ice behaviour, which is the focus of this presentation.

*I would like to thank the following funding agencies:

NSERC
Canadian Foundation for Innovation
Canadian Institute for Advanced Research
Canadian Research Chairs

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Presenters

  • Megan Rutherford

    • Physics and Astronomy, McMaster University

Authors

  • Megan Rutherford

    • Physics and Astronomy, McMaster University

  • Cole D Mauws

    • Chemistry, University of Manitoba

  • Casey Marjerrison

    • Department of Physics, Duke University
    • Physics and Astronomy, McMaster University
    • Duke University

  • Sara Haravifard

    • Physics, Duke University
    • Department of Physics, Duke University
    • Duke University
    • Duke Univ

  • James Beare

    • Physics and Astronomy, McMaster University
    • Department of Physics and Astronomy, McMaster University
    • McMaster University

  • Graeme Luke

    • Department of Physics, McMaster University
    • Physics and Astronomy, McMaster University
    • McMaster University
    • Department of Physics and Astronomy, McMaster University

  • Haidong Zhou

    • University of Tennessee
    • Department of Physics and Astronomy, University of Tennessee
    • University of Tennessee, Knoxville
    • Physics, University of Tennessee, Knoxville, TN, United States
    • Physics, University of Tennessee
    • Department of Physics and Astronomy, The University of Tennessee, Knoxville
    • Department of Physics and Astronomy, University of Tennessee, Knoxville
    • Department of Physics, University of Tennessee

  • Christopher R Wiebe

    • Chemistry, The University of Winnipeg