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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.

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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