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MA: Fachverband Magnetismus
MA 66: Poster 3
MA 66.18: Poster
Friday, March 24, 2017, 09:30–13:00, P2-OG2
In-Operando Studies of Ultrathin Magnetic Oxides: NiFe2O4 and La0.7Sr0.3MnO3 — •Ronja Anika Heinen1, Marek Wilhelm1, Patrick Lömker1, Katrin Neureiter1, Timm Gerber1, Andrei Gloskovskii2, Wolfgang Drube2, and Martina Müller1 — 1Forschungszentrum Jülich GmbH, PGI-6, Jülich, Germany — 2Deutsches Elektronen-Synchrotron Desy, Hamburg, Germany
Transition metal (TM) oxides exhibit a variety of physical properties due to their high tunability of spin, orbital and charge degrees of freedom. The initial way to tailor these properties is a precisely controlled growth process in order to prepare single-crystalline thin films. In the next step, electric or magnetic fields can be applied in order to tune and probe the magnetic and electric response and chemical compositions.
In our experiments, we investigate ultrathin films of the transition metal ferro(i)magnetic oxides NiFe2O4 (NFO) and La0.7Sr0.3MnO3 (LSMO) on SrTiO3(001) substrates. We use in-operando HAXPES with excitation energies of E= 4000−6000 eV and apply bias voltages of U=±3 V in order to analyse the electronic shifts of the chemical fingerprint of NFO and LSMO heterostructures. Furthermore, the ultra thin films are characterised in terms of electrical properties under applied in-plane and out-of-plane magnetic field. Also the magnetic response, i.e. the coercive field and saturation magnetization, are measured under applied electrical field via SQUID. The results provide insight into the interfacial band arrangement and chemical distribution of ultrathin 3d TM magnetic oxides.