Structural and Physical Properties of Magnetic EuMnSb<sub>2 </sub>Single Crystals

ORAL

Abstract

Layered EuMnPn2 (Pn = Sb, Bi) has generated immense interest because of the interplay between complex magnetism (Eu and Mn forming two magnetic sublattices) and topological properties. We have successfully grown EuMnSb2 single crystals, which form the tetragonal structure (space group P4/nmm) containing Sb square net. Both in-plane (ρab) and c-axis (ρc) resistivities show semiconductor-like behavior with an anomaly at TN ~ 20 K. Magnetization measurements indicate that there is an antiferromagnetic (AFM) transition at TN. Upon the application of the magnetic field along the c axis, the in-plane magnetoresistance (MRab) changes sign from positive at T > TN to negative at T < TN, while MRc reveals the opposite trend. This indicates that magnetic interactions are different between the ab plane and c direction. Further discussion will be presented.

**This work is supported by NSF through Grant Number DMR-1504226

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Presenters

  • Silu Huang

    • Louisiana State University
    • Department of Physics and Astronomy, Louisiana State University

Authors

  • Silu Huang

    • Louisiana State University
    • Department of Physics and Astronomy, Louisiana State University

  • Xin Gui

    • Chemistry, Louisiana State University
    • Louisiana State University
    • Department of Chemistry, Louisiana State University
    • Chemistry, Louisiana State Univeristy

  • Weiwei Xie

    • Chemistry, Louisiana State University
    • Louisiana State University
    • Department of Chemistry, Louisiana State University
    • Chemistry, Louisiana State Univeristy

  • Rongying Jin

    • Louisiana State University
    • Physics, Louisiana State University
    • Physics and astronomy, Louisiana State University
    • 2Condensed Matter Physics and Materials Science Departement, Brookhaven National Laboratory
    • Department of Physics and Astronomy, Louisiana State University
    • Physics and Astronomy, Louisiana State University