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@INPROCEEDINGS{YIN:1003867,
      author       = {YIN, CHENYANG and CAO, LEI and HE, SUQIN and DUCHON, TOMAS
                      and ZHOU, YUNXIA and PETRACIC, OLEG and BRÜCKEL, THOMAS},
      title        = {{T}uning the physical properties of
                      {L}a0.7{S}r0.3{M}n{O}3-δ via oxygen off-stoichiometry using
                      thermal annealing},
      reportid     = {FZJ-2023-01283},
      year         = {2023},
      abstract     = {The oxygen off-stoichiometry in La0.7Sr0.3MnO3-δ (LSMO)
                      thin films on SrTiO3 (STO) substrates has been investigated
                      employing Al-assisted vacuum annealing. The gradual
                      deoxygenation during annealing induces a topotactic phase
                      transition from the as-prepared Perovskite (PV, ABO3) phase
                      to a layered oxygen-vacancy-ordered Brownmillerite (BM,
                      ABO2.5) phase. The structural change is monitored by XRD. A
                      metal-to-insulator and simultaneously a ferromagnetic
                      (FM)-to-antiferromagnetic (AF) transition is found. The
                      variation of the manganese oxidation state is characterized
                      using XAS. The BM phase shows in magnetization vs.
                      temperature curves a peculiar peak above room temperature
                      which cannot be explained within the usual AF ordering at
                      low temperatures. Moreover, to elucidate the role of the
                      strain to the substrate, bulk-like LSMO powder samples were
                      prepared and annealed at similar conditions as the film
                      samples. Also here the PV-BM phase transition is achieved.},
      month         = {Mar},
      date          = {2023-03-26},
      organization  = {DPG-Frühjahrstagung der Sektion
                       Kondensierte Materie (SKM), Dresden
                       (Germany), 26 Mar 2023 - 31 Mar 2023},
      subtyp        = {Invited},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT / PGI-6 / PGI-7},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$ / I:(DE-Juel1)PGI-6-20110106 /
                      I:(DE-Juel1)PGI-7-20110106},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (FZJ) (POF4-6G4)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/1003867},
}