Berlin 2015 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 52: Magnetic Thin Films II

MA 52.8: Vortrag

Freitag, 20. März 2015, 11:30–11:45, H 1012

Magnetoelectric coupling at the La_1−xSr_xMnO₃/ionic liquid interface — •alan molinari, philipp leufke, christian reitz, robert kruk, and horst hahn — Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology (INT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany

In the last years electric-field control of magnetism has been in the focus of an intense research activity, not only for fundamental research studies but also for the potential realization of novel-low power consumption microelectronic devices. La_1−xSr_xMnO₃ (LSMO) is a half-metallic complex oxide with a Curie temperature above room temperature and a para-ferromagnetic transition correlated with the metal-insulator transition. A LSMO thin film has been combined with an ionic liquid in a plate capacitor-like geometry in order to investigate magnetoelectric coupling phenomena upon electrostatic surface charging. High quality epitaxial LSMO thin films have been grown on SrTiO₃ substrates by large-distance sputtering and characterized with atomic force microscopy, high-resolution x-ray diffraction and superconducting quantum interference device magnetometry. In situ measurements of magnetization response upon modulation of surface charge carriers have been performed in the 230-325 K temperature range by using a LSMO thin film as working electrode, a carbon cloth as counter electrode and an ionic liquid as charging medium.