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@BOOK{Schumacher:133358,
      author       = {Schumacher, Daniel},
      title        = {{I}nterplay between magnetic and dielectric phenomena at
                      transition metal oxide interfaces},
      volume       = {56},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2013-01835},
      isbn         = {978-3-89336-855-6},
      series       = {Schriften des Forschungszentrums Jülich.
                      Schlüsseltechnologien / Key Technologies},
      pages        = {IV, 127 S.},
      year         = {2013},
      abstract     = {The present work is concerned with the preparation,
                      characterzation and analysis of thin film heterostructures
                      of perovskite oxide materials. Two different systems have
                      been analyzed in detail:
                      La$_{0.66}$Sr$_{0.33}$MnO$_{3}$/SrTiO$_{3}$ (LSMO/STO)
                      heterostructures have been investigated in order to
                      understand the unusual occurrence of an exchange bias effect
                      in multilayers of these two oxides [1]. Monocrystalline LSMO
                      single and LSMO/STO bilayers have been grown on STO by both
                      High Osygen Pressure Sputter Deposition (HSD) and Pulsed
                      Laser Deposition. It was possible to reproduce the Exchange
                      Bias effect in the samples grown by HSD by reducing the
                      oxygen pressure during the layer growth. In fact, the size
                      of the effect can be increased by further reduction of the
                      oxygen pressure. The macroscopic sample analysis by X-ray
                      Diffraction and Vibrating Sample Magnetometry suggests that
                      the occurence of the Exchange Bias effect is linked to
                      oxygen deficiencies in the LSMO layer. By combining X-ray
                      Reflectometry, Polarized Neutron Reflectometry and X-ray
                      Resonant magnetic Scattering (XRMS), the magnetic depth
                      profile of the samples has been determined. By this, a
                      region in LSMO at the interface to STO has been detected,
                      where the magnetic moment is strongly suppressed. By putting
                      together the results of the macroscopic sample analysis and
                      the scattering experiments, an explanation for the occurence
                      of the effect can be given: It is roposed, that a
                      combination of strain and oxygen deficiencies shifts the
                      LSMO at the interface in the antiferromagnetic phase of the
                      LSMO strain vs. doping phase diagram. This interface region
                      thus couples to the ferromagnetic part of the LSMO causing
                      the Exchange BIAS effect. The second heterostructure system
                      under investigation in this work are bilayers of
                      La$_{0.5}$Sr$_{0.5}$MnO$_{3}$ (LSMO) and BaTiO$_{3}$ (BTO).
                      possible dependence of the interface near magnetic structure
                      [...]},
      cin          = {PGI-4 / JCNS-2 / JARA-FIT},
      cid          = {I:(DE-Juel1)PGI-4-20110106 / I:(DE-Juel1)JCNS-2-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {422 - Spin-based and quantum information (POF2-422) / 424 -
                      Exploratory materials and phenomena (POF2-424) / 542 -
                      Neutrons (POF2-542) / 544 - In-house Research with PNI
                      (POF2-544) / 54G - JCNS (POF2-54G24)},
      pid          = {G:(DE-HGF)POF2-422 / G:(DE-HGF)POF2-424 /
                      G:(DE-HGF)POF2-542 / G:(DE-HGF)POF2-544 /
                      G:(DE-HGF)POF2-54G24},
      typ          = {PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/133358},
}