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.

*Work supported by UMN NSF MRSEC

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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