Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 17: Poster Session I
MA 17.39: Poster
Dienstag, 8. März 2016, 09:30–12:30, Poster B1
Influence of oxygen content on magnetic properties in La1/2Sr1/2MnO3-δ thin films — Lei Cao1, •Alexander Weber2, Oleg Petracic1, 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 have a variety of promising applications ranging from sensors and spintronic devices to multifunctional materials. Most relevant future materials for e.g. electronics and photovoltaics are based on oxides. However, the influence of the oxide content after sample preparation on the physical properties is mostly unknown. We report on the fabrication of La1/2Sr1/2MnO3-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 varying oxygen atmospheres and at various temperatures. By employing SQUID magnetometry we then study the magnetic properties of the annealed systems. We thus relate the influence of oxygen absorption/desorption to the magnetic properties. Both Tc and the shape of the magnetic hysteresis turn out to depend on the oxygen stoichiometry.