Strong enhancement of magnetic critical temperature followed by loss of magnetism in EuPd<sub>3</sub>S<sub>4</sub> under high pressure

ORAL

Abstract

This work presents a comprehensive high-pressure study of the mixed-valent compound EuPd3S4 by electrical transport measurement, 151Eu synchrotron Mössbauer spectroscopy, X-ray absorption spectroscopy, and high-resolution X-ray diffraction. We find that the antiferromagnetic ordering temperature is strongly enhanced from 3 K to 25 K as the pressure is increased to 28 GPa. Above 28 GPa, a clear 1st order Eu2+ to Eu3+ valence transition is observed alongside 1) the vanishing of the magnetic order and 2) a cubic to tetragonal structural phase transition. These rich results suggest that the magnetic ordering temperature is enhanced as 4f hybridization with the conduction band is increased up to a critical value beyond which a sudden valence/ structural transition takes place. As such EuPd3S4 appears to be an excellent system for the detailed study of how magnetism, valence and structure are intertwined and should serve as a benchmark for theoretical efforts to model and understand mixed valence behavior.

*Work at Iowa State University is supported by the Ames Laboratory, US DOE, Basic Sciences, Material Science and Engineering Division under contract no. DE-AC02-07CH11358 and the Center for Advancement of Topological Semimetals (CATS), a U.S. DOE EFRC; Work at McGill University is supported by Fonds Québécois de la Recherche sur la Nature et les Technologies, and the Natural Sciences and Engineering Research Council (NSERC) Canada; Work at Argonne is supported by the U.S. Department of Energy, Office of Science, under contract No. DE-AC-02-06CH11357.

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Publication: N/A

Presenters

  • shuyuan huyan

    • Ames National Laboratory
    • Ames National Laboratory/Iowa State University

Authors

  • shuyuan huyan

    • Ames National Laboratory
    • Ames National Laboratory/Iowa State University

  • Dominic H Ryan

    • McGill University

  • Tyler J Slade

    • Ames Lab
    • Ames National Laboratory
    • Ames National Laboratory/Iowa State University

  • Barbara Lavina

    • Argonne National Laboratory

  • Greeshma C Jose

    • University of Alabama at Birmingham

  • Haozhe Wang

    • Michigan State University

  • John M Wilde

    • Iowa State University
    • Ames National Laboratory/Iowa State University

  • Jiyong Zhao

    • Argonne National Laboratory
    • Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA

  • Esen E Alp

    • Argonne National Laboratory

  • Weiwei Xie

    • Michigan State University
    • Department of Chemistry, Michigan State University

  • Wenli Bi

    • University of Alabama at Birmingham

  • Sergey L Bud'ko

    • Iowa State University
    • Ames National Laboratory
    • Ames Laboratory, U.S. DOE and Department of Physics and Astronomy, Iowa State University
    • Ames Laboratory

  • Paul C Canfield

    • Iowa State University
    • Ames National Laboratory
    • Ames National Laboratory/Iowa State University