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@INPROCEEDINGS{Zhang:877254,
      author       = {Zhang, Hengbo},
      title        = {{I}nfluence of oxygen stoichiometry onto the physical
                      properties of complex oxide thin films},
      reportid     = {FZJ-2020-02080},
      year         = {2020},
      abstract     = {Oxygen vacancies play a crucial role for controlling
                      physical properties in complex oxides. The oxygen
                      stoichiometry can be tuned e.g. via absorbing or desorbing
                      oxygen and by this modifying the lattice structure,
                      magnetization and electronic transport properties. This
                      provides the possibility for technological applications,
                      e.g. in information storage, catalysis or sensorics. In a
                      previous study of LaxSr1-xMnO3 (LSMO), thin films were grown
                      at large oxygen pressures on single crystal substrates
                      SrTiO3 and a perfect perovskite structure was obtained.
                      However, in this study here, LSMO thin films are grown at
                      lower oxygen pressures. As in the proceeding study the
                      samples are grown by High Oxygen Pressure Sputter
                      Deposition(HOPSD) at various growth parameters in order to
                      study the influence of the growth parameters onto the
                      structural and physical properties. Moreover, after
                      preparation various methods have been investigated to
                      deoxygenate the LSMO films, i.e. vacuum annealing, reductive
                      gas annealing, e.g. in ammonia, and titanium-sponge assisted
                      oxygen desorption. By vacuum annealing the oxygen-deficient
                      brownmillerite phase is prepared from the as-prepared
                      perovskite phase. The magnetic and electronic transport
                      properties evidence that the system becomes
                      antiferromagnetic and insulating. In addition, for a better
                      understanding of the magnetic behavior of the system,
                      Polarized Neutron Reflectivity (PNR) had been employed to
                      study the magnetic depth profile of the as-prepared system
                      as well as of the oxygen-deficient system.},
      month         = {May},
      date          = {2020-05-14},
      organization  = {Institutsseminar des JCNS-2,
                       Forschungszentrum Jülich (Germany), 14
                       May 2020 - 14 May 2020},
      subtyp        = {Invited},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {144 - Controlling Collective States (POF3-144) / 524 -
                      Controlling Collective States (POF3-524) / 6212 - Quantum
                      Condensed Matter: Magnetism, Superconductivity (POF3-621) /
                      6213 - Materials and Processes for Energy and Transport
                      Technologies (POF3-621) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-144 / G:(DE-HGF)POF3-524 /
                      G:(DE-HGF)POF3-6212 / G:(DE-HGF)POF3-6213 /
                      G:(DE-HGF)POF3-6G4},
      typ          = {PUB:(DE-HGF)31},
      url          = {https://juser.fz-juelich.de/record/877254},
}