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Large Hysteretic Magnetoresistance in La-doped SrSnO<sub>3</sub> Heterostructures: An Evidence of Magnetism?

ORAL

Abstract

In this talk, we present our recent observation of a robust, hysteretic magnetoresistance (MR) in low-doped Sr1-xLaxSnO3 films grown on GdScO3 (001)pc using radical-based MBE approach. At low temperatures, sample showed a transport behavior consistent with Efros-Shklovskii variable range hopping. The MR shows negative values for 6 K ≤ T ≤ 200 K whereas it crosses over to positive values at lower temperatures, 1.8 K ≤ T ≤ 5 K. A large anisotropy was observed at 1.8 K between the out-of-plane and the in-plane MR values with MR exceeding 100% for magnetic field in the plane of the sample. Significantly, a robust hysteretic behavior was observed at low temperatures, which disappears only at temperature above 5 K. We discuss the physical origin of the hysteresis, and the origin of large in-plane MR in low-doped SrSnO3 providing important and critical insights into the role of defects, strain and the choice of substrates on the electronic and magnetic properties.

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Presenters

  • Laxman Raju Thoutam

    Department of Chemical Engineering and Materials Science, University of Minnesota-Minneapolis, University of Minnesota

Authors

  • Laxman Raju Thoutam

    Department of Chemical Engineering and Materials Science, University of Minnesota-Minneapolis, University of Minnesota

  • Tristan Truttmann

    Department of Chemical Engineering and Materials Science, University of Minnesota, University of Minnesota, Chemical Engineering and Materials Science, University of Minnesota - Twin Cities

  • Anil K Rajapitamahuni

    University of Minnesota

  • Bharat Jalan

    Chemical Engineering & Materials Science, University of Minnesota, University of Minnesota, Chemical Engineering and Materials Science, University of Minnesotta, Department of Chemical Engineering and Materials Science, University of Minnesota, Chemical Engineering and Materials Science, University of Minnesota, Department of Chemical Engineering and Materials Science, University of Minnesota-Minneapolis, Chemical Engineering and Materials Science, University of Minnesota - Twin Cities