Regensburg 2013 – wissenschaftliches Programm

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DF: Fachverband Dielektrische Festkörper

DF 22: Poster II

DF 22.33: Poster

Freitag, 15. März 2013, 10:30–13:30, Poster D

Spin structure manipulation in nickel nanostructures by magneto-elastic coupling to piezoelectric PMN-PT substrates — •Simone Finizio¹, Michael Foerster¹, Carlos A. F. Vaz^1,2, Tetsuya Miyawaki³, Joshua L. Hockel⁴, Gregory P. Carman⁴, and Mathias Kläui¹ — ¹Institut für Physik, Johannes Gutenberg Universität, Mainz, Germany — ²SwissFEL, Paul Scherrer Institut, Villigen PSI, Switzerland — ³Department of Crystalline Materials Science, University of Nagoya, Nagoya, Japan — ⁴Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, USA

In recent years, there has been an increasing interest in current-less control of magnetization for reduced energy consumption in memory devices. One possible route to achieve such goal is given by the magneto-elastic coupling, through the exploitation of voltage-driven piezoelectric effects to manipulate the magnetization of a ferromagnetic thin film grown on a piezo-substrate. Here, we report XMCD-PEEM imaging of Ni ring-shaped nanostructures grown on PMN-PT. By applying an out-of-plane electric field, a piezoelectric strain is induced in the plane of the film, leading to reproducible modifications of the spin structure due to strain-induced anisotropy in Ni. The characterization shows a clear influence of the piezoelectric strain on the magnetization of the Ni nanostructures, where the nucleation of magnetic domains to 45° with respect to the applied strain direction is observed.