Berlin 2018 – wissenschaftliches Programm
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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 12: Multiferroics and magnetoelectrics II (joint session MA/KFM)
KFM 12.3: Vortrag
Mittwoch, 14. März 2018, 10:00–10:15, EB 202
On-off switching of magnetism in ultrathin films of La1−xSrxMnO3 gated with an ionic liquid — •Alan Molinari, Robert Kruk, and Horst Hahn — Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
Utilization of electric fields instead of conventional dissipative flowing currents to control magnetism may be the key for the realization of a variety of novel low-power microelectronic devices. In our work we addressed the control of the magnetization of ultrathin (about 3 nm) films of La1−xSrxMnO3 (LSMO) by means of ionic liquid (IL) gating. The magnetoelectric (ME) coupling1,2 at the LSMO/IL interface was investigated under various conditions of temperature and applied voltage via in situ synchronized Superconducting Quantum Interference Device magnetometry and Cyclic Voltammetry. Thanks to the high surface-to-volume ratio of the films and the large amounts of surface charge densities attainable with the IL, ferromagnetism could be reversibly suppressed and restored in LSMO by application of just a few volts. Our results intend to bring to attention some appealing functionalities of solid/liquid ME devices.
1A. Molinari et al., Nat. Comm. 8, 15339 (2017), doi:10.1038/ncomms15339
2A. Molinari et al., Adv. Mater. 1703908 (2017), doi: 10.1002/adma.201703908