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@BOOK{Glavic:22239,
      author       = {Glavic, Artur},
      title        = {{M}ultiferroicity in oxide thin films and heterostructures},
      volume       = {45},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {PreJuSER-22239},
      isbn         = {978-3-89336-803-7},
      series       = {Schriften des Forschungszentrums Jülich.
                      Schlüsseltechnologien / Key Technologies},
      pages        = {III, 152 S.},
      year         = {2012},
      note         = {Record converted from JUWEL: 18.07.2013},
      abstract     = {In this work a variety of different systems of transition
                      metal oxides ABO$_{3}$ (perovskite materials, where B stands
                      for a transition metal and A for a rare earth element) were
                      produced as thin films and heterostructures and analyzed for
                      the structural, magnetic and ferroelectric properties. For
                      the epitaxial film preparation mostly pules laser deposition
                      (PLD) was applied. For one series high pressure oxide
                      sputter deposition was used as well. The bulk multiferroics
                      TbMnO$_{3}$ and DyMnO$_{3}$, which develop their electric
                      polarization due to a cycloidal magnetic order, have been
                      prepared as single layers with thicknesses between 2 and 200
                      nm on YAlO$_{3}$ substrates using PLD and sputter
                      deposition. The structural characterization of the surfaces
                      and crystal structure where performed using x-ray
                      reflectometry and diffraction, respectively. These yielded
                      low surface roughness and good epitaxial growth. The
                      magnetic behavior was macroscopically measured with SQUID
                      magnetometry and microscopically with polarized neutron
                      diffraction and resonant magnetic x-ray scattering. While
                      all investigated samples showed antiferromagnetic order,
                      comparable with the collinear magnetic phase of their bulk
                      materials, only the sputter deposited samples exhibited the
                      multiferroic low temperature cycloidal order. The
                      investigation of the optical second harmonic generation in a
                      TbMnO$_{3}$ sample could proof the presence of a
                      ferroelectric order in the low temperature phase. The
                      respective transition temperatures of the thin films have
                      been very similar to those of the bulk materials. In
                      contrast an increase in the rare earth ordering temperature
                      has been observed, which reduces the Mn order slightly, an
                      effect not known from bulk TbMnO$_{3}$ crystals. The
                      coupling of the antiferromagnetic order in TbMnO$_{3}$ to
                      ferromagnetic layers of LaCoO$_{3}$ was investigated in
                      super-lattices containing 20 bilayers produced with PLD on
                      the same substrates. The SQUID magnetometry yielded a strong
                      influence of the antiferromagnetic transitions on the
                      overall magnetization. Element specific magnetization
                      measurement from XMCD showed that the ferromagnetism has
                      only Co contributions. The analysis of a polarized neutron
                      diffraction experiment resulted in a complex magnetic model,
                      which requires a strong coupling of the magnetic moments of
                      Mn and Co. The investigation of a system build of
                      EuTiO$_{3}$-BaTiO$_{3}$ super-lattices, produced with PLD on
                      GdScO$_{3}$ substrates, for a magnetic order of the Eu
                      system with polarized neutron reflectometry could eliminate
                      ferromagnetism down to 0.01 $\mu_{B}$. Nevertheless, the
                      system could be used to test simulation models, build for
                      reflectivity and diffraction on the other systems. All
                      simulations showed very good agreement with the experiments.
                      In the context of this thesis and in addition to the already
                      mentioned simulations the evaluation software Plot.py was
                      developed, which was used for most of the data analysis.},
      cin          = {PGI-4 / JCNS-2 / JARA-FIT},
      ddc          = {500},
      cid          = {I:(DE-Juel1)PGI-4-20110106 / I:(DE-Juel1)JCNS-2-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {Grundlagen für zukünftige Informationstechnologien},
      pid          = {G:(DE-Juel1)FUEK412},
      typ          = {PUB:(DE-HGF)3},
      url          = {https://juser.fz-juelich.de/record/22239},
}