Emergent Topological Hall Effect in La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub>/SrIrO<sub>3</sub> Heterostructures

POSTER

Abstract

Novel magnetic and electric phenomena could emerge in perovskite oxide heterostructures due to multiple and complex coupling at the hetero-interface. Here, we report that an emergent giant topological Hall effect (THE) can be induced in ferromagnetic La0.7Sr0.3MnO3 thin films in a wide temperature range up to 200 K by constructing La0.7Sr0.3MnO3/SrIrO3 epitaxial heterostructures. The observed THE indicates a non-coplanar spin texture, which also leads to strongly pinched field dependent magnetization (MH) loops in the out-of-plane direction. This THE and pinched MH loops are not observed in La0.7Sr0.3MnO3 single layer films or La0.7Sr0.3MnO3/SrTiO3/SrIrO3 trilayer heterostructures, indicating the relevance of the La0.7Sr0.3MnO3/SrIrO3 interface, where Dzyaloshinskii-Moriya interaction due to strong spin-orbital coupling in SrIrO3 may play a crucial role. This work demonstrates the feasibility of using SrIrO3 to modify magnetic and transport characteristics by interfacing with other correlated oxides, which might be useful to novel spintronic applications.

Presenters

  • yao li

    • Nanjing University

Authors

  • yao li

    • Nanjing University

  • Lunyong Zhang

    • Laboratory for Pohang Emergent Materials and Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang 790-784, Korea
    • Laboratory for Pohang Emergent Materials and Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
    • Max Planck Institute for Chemical Physics of Solids

  • qinghua zhang

    • CAS, Beijing National Laboratory for Condensed-Matter Physics and Institute of Physics
    • Institute of Physics, Chinese Academy of Sciences

  • chen li

    • Nanjing University

  • tieying yang

    • Shanghai Institute of Applied Physics, Chinese Academy of Sciences

  • yu deng

    • Nanjing University

  • lin gu

    • Institute of Physics, Chinese Academy of Sciences

  • di wu

    • Department of Materials Science and Engineering, Nanjing University
    • Nanjing University