A new stress dilatometer, and measurement of the thermal expansion under uniaxial stress of Mn<sub>3</sub>Sn

ORAL

Abstract

We present new a new device for measuring the thermal expansion of materials under tunable uniaxial stress. We have performed first measurements on Mn3Sn - a room temperature antiferromagnet (AFM) that exhibits a spontaneous Hall effect [1]. Measurement of thermal expansion provides thermodynamic data about the nature of phase transitions, and uniaxial stress provides a powerful tuning method that does not introduce disorder. Mn3Sn exhibits an anomaly in its thermal expansion near ~270 K, associated with a first order change in the magnetic structure. We show that this transition temperature is suppressed under uniaxial compression along the c-axis. These results show the efficacy of our stress-dilatometer as well as provide new, thermodynamic insight into the response to applied stress of Mn3Sn.

[1] Satoru Nakatsuji, Naoki Kiyohara, and Tomoya Higo, Nature 527, 212–215 (2015)

–

Presenters

  • Kent Shirer

    • Max Planck Institute for Chemical Physics of Solids

Authors

  • Kent Shirer

    • Max Planck Institute for Chemical Physics of Solids

  • Muhammad Ikhlas

    • Institute for Solid State Physics, the University of Tokyo
    • ISSP, The University of Tokyo
    • Univ of Tokyo-Kashiwanoha
    • Institute for Solid State Physics, Univ of Tokyo-Kashiwanoha
    • ISSP, University of Tokyo

  • Po-Ya Yang

    • Max Planck Institute for Chemical Physics of Solids

  • Andrew Mackenzie

    • Max Planck Institute for Chemical Physics of Solids
    • Max Planck Institut for Chemical Physics of Solids
    • Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
    • MPI CPfS, Dresden, Germany

  • Clifford W. Hicks

    • Max Planck Institute for Chemical Physics of Solids
    • MPI CPfS, Dresden, Germany
    • Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

  • Satoru Nakatsuji

    • Univ of Tokyo-Kashiwanoha
    • University of Tokyo
    • Institute for Solid State Physics, University of Tokyo
    • Institute for Solid State Physics, the University of Tokyo
    • Department of Physics, The University of Tokyo
    • Department of Physics, University of Tokyo
    • The Institute for Solid State Physics, The University of Tokyo
    • Institute for Solid State Physics, Univ of Tokyo-Kashiwanoha