Local Control of Magneto-crystalline Anisotropy of La0.7Sr0.3MnO3 Thin Films through Ion Implantation

ORAL

Abstract

Control of the functional properties of thin films, including the magneto-crystalline anisotropy, is critical for the development of future memory and spintronic devices. Perovskite oxides offer stimulus-sensitive properties due to the strong coupling between their spin, orbital, lattice, and charge degrees of freedom. In this work, we found that ion implantation of La0.7Sr0.3MnO3 films induces changes in the magnetic anisotropy by causing an out-of-plane lattice expansion while the film remains coherently strained to the substrate. However, the ion implantation also leads to a reduction in Curie temperature and saturation magnetization. X-ray absorption spectroscopy shows this degradation in magnetic properties is in part due to the reduced Mn oxidation state, in addition to crystalline damage. With the proper substrate selection and optimization of ion implantation conditions, the easy axis of the film can be tuned from in-plane to out-of-plane while minimizing the reduction in magnetization. These results may enable the design of unique magnetic spin textures such as magnetic skyrmions in a single layer of material containing adjacent regions of in-plane and out-of-plane magnetization.

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Presenters

  • Yayoi Takamura

    University of California, Davis, Materials Science and Engineering, University of California Davis, Materials Science and Engineering, University of California, Davis

Authors

  • Michael Steven Lee

    University of California, Davis, Materials Science and Engineering, University of California Davis, Materials Science and Engineering, University of California, Davis

  • Rajesh V Chopdekar

    University of California, Davis, Materials Science and Engineering, University of California Davis, Advanced Light Source, Lawrence Berkeley National Laboratory, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA, LBNL Advanced Light Source

  • Elke Arenholz

    Advanced Light Source, Lawrence Berkeley National Laboratory, Lawrence Berkeley National Laboratory, Advanced Light Source

  • Yayoi Takamura

    University of California, Davis, Materials Science and Engineering, University of California Davis, Materials Science and Engineering, University of California, Davis