Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 66: Poster 3

MA 66.27: Poster

Freitag, 24. März 2017, 09:30–13:00, P2-OG2

Control of the magnetization dynamics through the Magneto-Elastic coupling effect — •Simone Finizio¹, Sebastian Wintz^1,2, Eugenie Kirk¹, Anna Suszka¹, Sebastian Gliga³, and Jörg Raabe¹ — ¹Paul Scherrer Institut, Villigen PSI, Switzerland — ²Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany — ³University of Glasgow, Glasgow, UK

The magnetoelastic (ME) coupling has recently become of interest thanks to its numerous applications, e.g. in the fabrication of magnetoelectric multiferroics. This effect has been recently studied quasi-statically on micro- and nanostructured magnetostrictive materials strained using piezoelectric substrates. However, due to limitations in the radio frequency (RF) properties of piezoelectric materials, the influence of the ME coupling on the magneto-dynamical processes has not yet been investigated in depth. Here, thanks to a newly-developed approach that allows the in-situ straining of magnetostrictive materials whilst preserving good RF properties of the substrate, we present a first study of the influence of the ME coupling on the gyration dynamics of magnetic vortices in microstructured magnetostrictive elements using time-resolved x-ray magnetic microscopy. In particular, we observe that the application of a strain to the magnetostrictive material leads to a reduction of the gyration eigenfrequency, and to a modification of the orbit of the vortex core, both of which can be controlled by changing the magnitude of the applied strain.