APS Logo

Formation of a Simple Cubic Antiferromagnet Through Charge Ordering

ORAL

Abstract

EuPd3S4 is a mixed-valent lattice in which the BCC Eu2+ and Eu3+ ions occur in about a 1:1 ratio. The magnetic order below TN=2.9 K, however, has not been directly probed. Here we report what are to our knowledge the first neutron diffraction results on EuPd3S4 single-crystals, as well as comprehensive heat capacity measurements revealing the magnetic phase diagram. In addition to identifying k=(1/2,1/2,1/2) antiferromagnetic order, we find forbidden nuclear reflections in the field-polarized paramagnetic state. Our results resolve a longstanding question regarding charge ordering in EuPd3S4, showing the glide symmetries connecting Eu 2a sites are in-fact broken and the space group is of lower symmetry than previously understood.

–

Presenters

  • Vincent C Morano

    Johns Hopkins University

Authors

  • Vincent C Morano

    Johns Hopkins University

  • Tanya Berry

    Princeton University

  • Thomas J Halloran

    Johns Hopkins University

  • Jason Zhang

    Johns Hopkins University

  • Aashish Sapkota

    Ames National Laboratory, Ames National Laboratory/Iowa State University

  • Weiwei Xie

    Rutgers, The State University of New Jersey

  • Zhijun Xu

    University of Maryland, College Park

  • Yang Zhao

    University of Maryland, College Park

  • Jeffrey W Lynn

    National Institute of Standards and Tech

  • Tom Fennell

    Paul Scherrer Institut, Switzerland, Paul Scherrer Institut

  • Paul C Canfield

    Iowa State University, Ames National Laboratory, Ames National Laboratory/Iowa State University

  • Tyrel M McQueen

    Johns Hopkins University, Cornell University, Department of Chemistry, Johns Hopkins University

  • Collin L Broholm

    John Hopkins University, Johns Hopkins University