Magnetic structure and electronic properties in Layered BaMn<sub>2</sub>Sb<sub>2</sub> and Ba<sub>2</sub>Mn<sub>3</sub>Sb<sub>2</sub>O<sub>2</sub>

ORAL

Abstract

We present the structural, electronic, and magnetic properties of BaMn2Sb2 and Ba2Mn3Sb2O2 single crystals, both with the layered structure analogous to high-temperature Fe- and/or Cu-based superconductors. While the Mn moment in the MnSb4 tetrahedral environment forms a long-range G-type antiferromagnetic (AFM) ordering in both BaMn2Sb2 (TN1 ≈443 K) and Ba2Mn3Sb2O2 (TN1 ≈314 K), a short-range AFM order is found in the intercalated MnO2 layer at a much lower temperature (TN2 ≈60 K) coexisting with long-range G-type order in MnSb4 layer in Ba2Mn3Sb2O2. The directions of the ordered moments in these two magnetic sub-lattices of Ba2Mn3Sb2O2 are perpendicular to each other. The G-type AFM order in MnSb4 layers in both compounds is distinct from the stripe-like order in Fe-based superconductors, but the in-plane magnetic structure in MnO2 layers of Ba2Mn3Sb2O2 is found to be similar to that in the Cuprates. Our study reveals the significant and distinct roles of the CuO2- and FeAs4-type transition metal layers in the structure, novel magnetic and electronic properties.

*This work was primarily supported by the U.S. Department of Energy under EPSCoR Grant No. DE-SC0012432. A portion of this research used resources at the High Flux Isotope Reactor, a DOE Office of Science User Facility.

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Presenters

  • Qiang Zhang

    • Louisiana State University, Baton Rouge, LA 70803 USA and Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA*
    • Physics, Louisiana State University

Authors

  • Qiang Zhang

    • Louisiana State University, Baton Rouge, LA 70803 USA and Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA*
    • Physics, Louisiana State University

  • Zhenyu Diao

    • Louisiana State University, Baton Rouge, LA 70803 USA

  • Huibo Cao

    • Oak Ridge National Lab
    • Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
    • Neutron Scattering Division, Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
    • Oak Ridge Natl Lab

  • Ahmad Ikhwan Us Saleheen

    • Louisiana State University, Baton Rouge, LA 70803 USA
    • Louisiana State University, Baton Rouge

  • Ramakanta Chapai

    • Louisiana State University, Baton Rouge, LA 70803 USA
    • Physics, Louisiana State University
    • Louisiana State University, Baton Rouge

  • Dongliang Gong

    • Louisiana State University, Baton Rouge
    • Louisiana State University, Baton Rouge, LA 70803 USA

  • Shane Stadler

    • Louisiana State University, Baton Rouge, LA 70803 USA

  • Rongying Jin

    • Louisiana State University, Baton Rouge
    • Department of Physics & Astronomy, Louisiana State University
    • Louisiana State University, Baton Rouge, LA 70803 USA
    • Physics, Louisiana State University
    • Louisiana State University