Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 43: Micro- and nanostructured magnetic materials
MA 43.4: Vortrag
Donnerstag, 4. April 2019, 10:15–10:30, H52
Voltage control of magnetism in Iron oxide/Iron nanostripes and electrodeposition of epitaxial Fe nanocuboids — •Martin Nichterwitz1,2, Shashank Honnali Sudheendra1, Jonas Zehner1, Mara Henschel1, Kornelius Nielsch1, and Karin Leistner1 — 1IFW Dresden, Helmholtzstr. 20, 01069 Dresden, Germany — 2Physical Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
Voltage control of magnetism by ionic approaches, such as the transformation between metal oxide and metal in gated architectures, presents a promising pathway to low-power magnetic devices. Up to now, magneto-ionic manipulation has been reported mainly for ultrathin films.[1,2] We investigate the transfer of magneto-ionic effects from extended thin film to nanostripe geometry. We present initial results on voltage-controlled magnetoresistance in sputtered Fe stripes on Au probed via in situ magneto-transport measurements. The magnetoresistance behavior is found to be strongly dependent on the FeOx/Fe thickness. A voltage-induced change of resistance and magnetoresistance is achieved and discussed with regard to the electrochemical manipulation of the grain boundaries. Further, electrochemical control of shape and magnetism of FeOx/Fe nanoislands is presented by epitaxial electrodeposition on GaAs. A stable Fe core with crystalline oxide shell and strong in-plane magnetic anisotropy is achieved.[3]
[1] Gilbert et al., Nature Comm. 7, (2016) 12264 [2] Duschek et al., APL Mater. 4 (2016) 032301 [3] Leistner et al. Nanoscale 9 (2017) 5315