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Magnetic Structure of the Zintl Material Eu<sub>5</sub>In<sub>2</sub>Sb<sub>6</sub>

ORAL

Abstract

Eu5In2Sb6 is a Zintl material that displays perhaps the greatest (negative) colossal magnetoresistance of observed stoichiometric antiferromagnetic materials. It has also been proposed as an axion insulator candidate. To our knowledge, the magnetic structure of Eu5In2Sb6 has not yet been reported. Using neutron diffraction, we find the 14 K transition previously observed in heat capacity and magnetization gives k=0 order while the 7 K transition is to a multi-k structure with a second k=(0,0,1/2) propagation vector. We report refined magnetic structures for both phases. This work contributes to our understanding of both magnetic and exotic transport properties in Eu5In2Sb6. It also suggests the magnetic structure of substituted variants, which may realize the axion state.

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Presenters

  • Vincent C Morano

    Johns Hopkins University

Authors

  • Vincent C Morano

    Johns Hopkins University

  • Tanya Berry

    Johns Hopkins University

  • Nicodemos Varnava

    Rutgers University, New Brunswick, Rutgers University

  • Jonathan Gaudet

    National Institute of Standards and Technology, Johns Hopkins University

  • Rishi Bhandia

    Johns Hopkins University

  • Anaelle Legros

    Johns Hopkins University

  • Thomas J Halloran

    Johns Hopkins University

  • Chris J Lygouras

    Johns Hopkins University, John Hopkins University

  • Will Liang

    Johns Hopkins University

  • N. P Armitage

    Johns Hopkins University, Johns Hopikns Univ., The Institute for Quantum Matter, Department of Physics and Astronomy, The Johns Hopkins University

  • Guangyong Xu

    National Institute of Standards and Technology

  • Jeffrey W Lynn

    National Institute of Standards and Tech, National Institute of Standards and Technology

  • David Vanderbilt

    Rutgers University, Rutgers University, New Brunswick

  • Tyrel M McQueen

    Johns Hopkins University, Department of Chemistry, The Johns Hopkins University

  • Collin L Broholm

    Johns Hopkins University, John Hopkins University