Structural and Physical Properties of CeAu<sub>2</sub>Bi: a New Frustrated Antiferromagnet Candidate

ORAL

Abstract

Ce-based compounds often display emergent phenomena due to the interplay between competing magnetic interactions, crystalline electrical field (CEF) effects, and the Kondo effect. Here we report the structural and physical properties of the new heavy-fermion compound CeAu2Bi. CeAu2Bi crystallizes in a hexagonal structure (P63/mmc) with lattice parameters of a = 4.8867(5) Å and c = 9.3748(13) Å. This structure presents Ce planes containing a triangular lattice, which has the potential of displaying geometrical frustration. Antiferromagnetic ordering, however, takes place at TN = 3.1 K, and is enhanced as a function of pressure, reaching 4.2 K at 18 kbar. We discuss our experimental results in the light of band structure calculations.

*This work was supported by FAPESP grants: 2015/15665-3, 2017/25269-3, 2017/10581-1; CAPES and CNPq, Brazil. Work at Los Alamos was performed under the auspices of the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Science and Engineering. P. F. S. R. acknowledges support from the Laboratory Directed Research and Development program of Los Alamos National Laboratory under project number 20190076ER.

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Presenters

  • Mario Moda Piva

    • Universidade Estadual de Campinas

Authors

  • Mario Moda Piva

    • Universidade Estadual de Campinas

  • Filip Ronning

    • Los Alamos National Laboratory, Los Alamos, NM 87545, USA
    • Los Alamos National Laboratory
    • MPA-CMMS, Los Alamos National Laboratory, Los Alamos, USA
    • MPA-CMMS, Los Alamos National Laboratory
    • Los Alamos National Laboratory, Los Alamos, New Mexico, USA
    • Los Alamos National Labs

  • Joe D Thompson

    • Los Alamos National Laboratory
    • MPA-CMMS, Los Alamos National Laboratory, Los Alamos, USA
    • MPA-CMMS, Los Alamos National Laboratory
    • Condensed Matter and Magnet Sciences, Los Alamos National Laboratory

  • Pascoal Pagliuso

    • Universidade Estadual de Campinas

  • Priscila Rosa

    • Los Alamos National Laboratory
    • MPA-CMMS, Los Alamos National Laboratory, Los Alamos, USA
    • Condensed Matter and Magnet Sciences, Los Alamos National Laboratory