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@INPROCEEDINGS{Zhang:885885,
      author       = {Zhang, Hengbo},
      title        = {{I}nfluence of oxygen stoichiometry onto the physical
                      properties of {L}a0.7{S}r0.3{M}n{O}3-delta powder and thin
                      films},
      reportid     = {FZJ-2020-04161},
      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, the ideal oxygen pressure and plasma power
                      are found to grow a perfect Perovskite LSMO thin film on
                      single crystal substrates SrTiO3 using High Oxygen Pressure
                      Sputter Deposition (HOPSD). In this study here, a series of
                      samples with different deposition times are grown in order
                      to study the influence of the thickness onto the structural
                      and physical properties.Moreover, after preparation various
                      methods have been employed to deoxygenate the LSMO thin
                      films and powder, i.e. vacuum annealing, reductive
                      atmosphere annealing, and Aluminum assisted oxygen
                      desorption. By post-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, Polarized Neutron
                      Reflectivity (PNR) had been used to study the magnetic depth
                      profile of the as-prepared system.},
      month         = {Oct},
      date          = {2020-10-15},
      organization  = {Digital Institute Seminar JCNS-2,
                       Forschungszentrum Jülich GmbH
                       (Germany), 15 Oct 2020 - 15 Oct 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/885885},
}