Voltage control of magnetism in metal oxide/metal nanoislands and nanostripes

ORAL

Abstract

Voltage control of magnetism by ionic approaches presents a promising pathway to low-power magnetic devices. Up to now, magneto-ionic manipulation has been reported mainly for ultrathin films and nanoporous structures.[1-3] Since the mechanism is based on interfacial charge transfer, the morphology may be key to the magneto-ionic efficiency.
We investigate the influence of morphology on magneto-ionic changes during electrolytic gating of FeOx/Fe nanostructures. In FeOx/Fe nanoislands [4], the magneto-ionic changes are enhanced compared to continuous films and close to ON/OFF switching of magnetization is achieved.[5] The results are explained mainly by the higher surface/volume ratio of the nanoislands. Further, we investigate the transfer of magneto-ionic effects from extended thin film to nanostripe geometry. We present initial results on voltage-controlled magnetoresistance in FeOx/Fe stripes probed via in situ magneto-transport measurements.
[1] Gilbert et al., Nat. Commun., 2016, 7, 12264
[2] Quintana et al., Small, 2018, 14, 1704396
[3] Duschek et al., APL Mater.,2016, 4, 032301
[4] Leistner et al., Nanoscale, 2017, 9, 5315
[5] Duschek et al., J. Mater. Chem. C, 2018, 6, 8411

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Presenters

  • Martin Nichterwitz

    Leibniz Institute of Solid State and Materials Research (IFW Dresden), Helmholtzstr. 20, 01069 Dresden, Germany

Authors

  • Martin Nichterwitz

    Leibniz Institute of Solid State and Materials Research (IFW Dresden), Helmholtzstr. 20, 01069 Dresden, Germany

  • Shashank Honnali Sudheendra

    Leibniz Institute of Solid State and Materials Research (IFW Dresden), Helmholtzstr. 20, 01069 Dresden, Germany

  • Jonas Zehner

    Leibniz Institute of Solid State and Materials Research (IFW Dresden), Helmholtzstr. 20, 01069 Dresden, Germany

  • Kenny Duschek

    Leibniz Institute of Solid State and Materials Research (IFW Dresden), Helmholtzstr. 20, 01069 Dresden, Germany

  • Kornelius Nielsch

    Institute of Metallic Materials, Leibniz IFW - Dresden, Leibniz IFW and TU Dresden, Leibniz Institute of Solid State and Materials Research (IFW Dresden), Helmholtzstr. 20, 01069 Dresden, Germany, Leibniz Institute of Solid State and Materials Research (IFW Dresden), Helmholtzstr. 20, 01069 Dresden, Germany; Institute of Applied Physics, Technische Universität Dresden,, Leibniz Institute for Solid State and Materials Research, Leibniz Institute of Solid State and Materials Research (IFW Dresden), Helmholtzstr. 20, 01069 Dresden, Germany; Institute of Materials Science, Technische Universität Dresde

  • Karin Leistner

    Leibniz Institute of Solid State and Materials Research (IFW Dresden), Helmholtzstr. 20, 01069 Dresden, Germany