Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 66: Poster 3
MA 66.2: Poster
Freitag, 24. März 2017, 09:30–13:00, P2-OG2
Influence of oxygen content on magnetic properties in La2/3Sr1/3MnO3-δ thin films — •Lei Cao1, Oleg Petracic1, Alexander Weber2, and Thomas Brückel1,2 — 1Jülich Centre for Neutron Science JCNS and Peter Grünberg Institut PGI, JARA-FIT, Forschungszentrum Jülich GmbH, Jülich — 2Jülich Centre for Neutron Science JCNS at Heinz Maier-Leibnitz Zentrum MLZ, Forschungszentrum Jülich GmbH, Garching
Complex oxides display a multitude of unique phenomena, such as various forms of magnetism, superconductivity, colossal magnetoresistance, ferroelectricity, and couplings between these states. While most studies on complex oxide thin films focus on the parameters of film deposition and the role of oxygen during preparation the role of oxygen content after sample preparation onto the physical properties is mostly unknown. We report on the fabrication of La2/3Sr1/3MnO3-δ thin films on SrTiO3 substrates by sputter deposition. Using an in-situ x-ray diffraction setup we investigate the crystallographic properties while annealing the samples in vacuum and at various temperatures. While annealing induces a desorption of oxygen, absorption of oxygen is realized in a controlled oxygen plasma of a sputtering setup. By employing superconducting quantum interference (SQUID) magnetometry and electrical resistivity measurements, we study the magnetic and transport properties of the as-prepared, annealed and plasma treated systems. We then relate the influence of oxygen absorption/desorption to the physical properties of the films.