Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 23: Non-ultrafast magnetization dynamics
MA 23.11: Vortrag
Mittwoch, 14. März 2018, 12:15–12:30, H 0112
Electric field control of gyration dynamics of magnetic vortices — •Mariia Filianina1,2, Lorenzo Baldrati1, Tetsuya Hajiri3, and Mathias Kläui1,2 — 1Mainz University, 55128 Mainz, Germany — 2Graduate School of Excellence MAINZ, 55128 Mainz, Germany. — 3Nagoya University, 464-8603 Nagoya, Japan.
Energy-efficient control of magnetism is fundamental for the development of spintronic devices. This is enabled for instance by the electric field control of the magnetization, as can be done in multiferroic materials [1]. Significantly large magneto-elastic effect (ME), i.e. tuning the magnetic anisotropy by strain, can be induced by an electric field in magnetic thin films grown on piezoelectric substrates [2-5]. While the quasi-static behavior of the ME effect has been thoroughly analyzed, there are only a few experimental studies of the effect of ME coupling on the dynamical behavior of the magnetization [4,5].
Here we report on the electric field control of magnetic vortex core gyration dynamics via ME effect in magnetostrictive microstructures fabricated on top of a piezoelectric substrate. Piezoelectric strain modifies the anisotropy and thus the vortex gyration trajectories which we image by means of time-resolved XMCD-PEEM. A comparison with micromagnetic simulations is presented to quantitatively assess the dynamical effect resulting from the ME coupling.
1. N.A. Spaldin and M. Fiebig, Science 309, 391 (2005). 2. J.G. Wan et al., Appl. Phys. Lett. 88, 182502 (2006). 3. S. Finizio et al., Phys. Rev. Appl. 1, 021001 (2014). 4. M. Foerster et al., Nat. Commun. 8, 407 (2017). 5. S. Finizio et al., Phys. Rev. B 96, 054438 (2017).