Magneto-transport and Magnetism in Antiferromagnetic GdSbTe

ORAL

Abstract

The crystal structure of GdSbTe belongs to the PbFCl-type family that is known for exhibiting a possible topological nodal-line phase. The spin-7/2 Gd3+ ions form a square lattice in the ab plane with large moments. Recently, a Dirac-like state was observed in GdSbTe by ARPES measurement [1]. Magnetization and specific heat measurements also revealed an antiferromagnetic (AFM) transition with a Néel temperature of around 12 K [2], making it a suitable system to study the interplay between AFM and topological states. Here, we report the angular dependence of the magneto-transport properties in GdSbTe. Several features in magnetoresistance (MR) measurements were uncovered while sweeping an in-plane magnetic field, including abrupt increases of MR occurs at 2 T and 6 T and an unusual hysteretic giant magnetoresistance (GMR)-like behavior at higher magnetic fields. We remark that those features are absent when the magnetic field is applied perpendicular to the ab-plane direction. The magneto-transport and magnetization measurements up to a magnetic field of 14 T will be presented and compared to several metallic spin systems.

[1] M. M. Hosen et al., Sci. Rep. 8, 13283 (2018).
[2] R. Sankar et al., in preparation.

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Presenters

  • Tsung-Chi Wu

    Institute of Physics, Academia Sinica, Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan, Institute of Physics, Academia Sinica, Nankang, Taipei, 11529, Taiwan

Authors

  • Tsung-Chi Wu

    Institute of Physics, Academia Sinica, Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan, Institute of Physics, Academia Sinica, Nankang, Taipei, 11529, Taiwan

  • Akhilesh Singh

    Institute of Physics, Academia Sinica, Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan, Institute of Physics, Academia Sinica, Nankang, Taipei, 11529, Taiwan

  • Ming-Chin Chen

    Institute of Physics, Academia Sinica, Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan

  • Raman Sankar

    Center for Condensed Matter Sciences, National Taiwan University, Center for Condensed Matter Science, National Taiwan University, Center of Condensed Matter Sciences, National Taiwan University, Institute of Physics, Academia Sinica, National Taiwan University, Physics, Academia Sinica, Taiwan

  • Fangcheng Chou

    Center for Condensed Matter Sciences, National Taiwan University, Center of Condensed Matter Sciences, National Taiwan University, National Taiwan University

  • Wei-Li Lee

    Institute of Physics, Academia Sinica, Institute of Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan, Institute of Physics, Academia Sinica, Nankang, Taipei, 11529, Taiwan