Dresden 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 49: Surface Magnetism 2 (Joint Session with O)
MA 49.9: Vortrag
Donnerstag, 23. März 2017, 11:45–12:00, HSZ 401
All-electrochemical-approach towards voltage-tunable nanomagnets — •Kenny Duschek1, Andreas Petr1, Margitta Uhlemann1, Veronika Hähnel1, Kornelius Nielsch1,2, and Karin Leistner1 — 1Leibniz-Institute for Solid State and Materials Research, Dresden, Germany — 2TU Dresden, Germany
Electric field control of magnetism in thin metal/metal oxide nanostructures offers new energy-saving opportunities for the development of microelectromechanical systems, microfluidics and spintronics. Recently, it was shown that large changes in magnetism can be realized by exploiting magneto-ionic effects [1, 2]. In previous studies we obtained large changes of the saturation magnetization in sputter deposited thin iron films by using them as an electrode in an aqueous electrolyte containing 1 M KOH [2]. Changes were achieved by reversibly switching the oxidation state of a 1.5 nm Fe reaction layer. Much larger effects can be obtained by increasing the surface-to-volume ratio of the magnetic nanostructures. Here we demonstrate an all-electrochemical-approach where the magnetism of an electrodeposited nanogranular iron film can be switched almost on and off reversibly. The effects were proved by in situ measurements of the anomalous Hall effect and the ferromagnetic resonance.
[1] U. Bauer, S. Emori and G. S. D. Beach, Nature Nanotechnology 8 (2013) 411-416; [2] K. Duschek, D. Pohl, S. Fähler, K. Nielsch and K. Leistner, APL Materials 4 (2016) 032301-1 - 032301-10