Specific heat measurements of Ce2Zr2O7 in magnetic field

POSTER

Abstract

We measured specific heat of the pyrochlore Ce2Zr2O7 in magnetic field up to 14 T and temperatures down to 60 mK. In zero field we observe a monotonic rise of the specific heat, with the values of C/T reaching 30 J/mol-K at 100 mK, and without saturation, at least in some compounds. The field was applied in either [100] or [110] directions. Even small magnetic field on the order of a kilogauss pushes the entropy up in temperature, developing a broad maximum in C(T), which moves up in temperature with increasing magnetic field. The calculated entropy is consistent with a doublet ground state. Extreme sensitivity to small magnetic field is consistent with a disordered zero-field ground state, with entropy piling up towards T=0, indicating a possible spin-liquid.

Presenters

  • Roman Movshovich

    Los Alamos National Laboratory, Condensed Matter and Magnet Sciences, Los Alamos National Laboratory

Authors

  • Roman Movshovich

    Los Alamos National Laboratory, Condensed Matter and Magnet Sciences, Los Alamos National Laboratory

  • Andrea Bianchi

    Département de physique, Université de Montréal, Montréal, QC, H3T 3J7, Canada, Universite de Montreal

  • Jérémie Dudemain

    Département de physique, Université de Montréal, Montréal, QC, H3T 3J7, Canada, Universite de Montreal

  • Michael Nicklas

    Max Planck Institute for Chemical Physics of Solids, Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40 D-01187 Dresden, Germany

  • Evan Smith

    Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1, McMaster University, Department of Physics and Astronomy, McMaster University, Physics and Astronomy, McMaster University

  • Bruce Gaulin

    Department of Physics and Astronomy, McMaster University, McMaster University, Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1, Physics and Astronomy, McMaster University

  • Jonathan Gaudet

    Department of Physics and Astronomy, McMaster University, Johns Hopkins University, Baltimore, MD 21218, Institute for Quantum Matter and Department of Physics and Astronomy, Johns Hopkins University, Physics and Astronomy, Johns Hopkins University, IQM, Johns Hopkins University