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.

*This work was supported as part of the Institute for Quantum Matter, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award No. DE-SC0019331.

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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