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@INPROCEEDINGS{Schffmann:867753,
      author       = {Schöffmann, Patrick and Pütter, Sabine and Sarkar,
                      Anirban and Zhernenkov, Kirill and Syed Mohd, Amir and
                      Waschk, Markus and Bhatnagar, Tanvi and Zakalek, Paul and
                      Brückel, Thomas},
      title        = {{T}opotactic transition mechanisms in {S}r{C}o{O}$_{2.5+x}$
                      films},
      reportid     = {FZJ-2019-06368},
      year         = {2019},
      abstract     = {Transition metal oxides are a big research topic, because
                      they offer a wide range of possible applications,
                      particularly in information and energy technology. One such
                      system is strontium cobaltite (SrCoO2.5+x), which exists in
                      two distinct topotactic phases, depending on the oxygen
                      content. SrCoO3 is a ferromagnetically ordered metal with a
                      Curie temperature of 305 K, but the system becomes an
                      antiferromagnetic insulator with a Néel temperature of 570
                      K, when the oxygen content is decreased to SrCoO2.5. Along
                      with this magnetic transition, the structure changes from
                      perovskite to the orthorhombic brownmillerite, with the
                      missing oxygen atoms forming vacancy channels [1]. Because
                      of the multivalent Co states and high oxygen mobility it is
                      a promising material for device applications [2]. To control
                      the oxygen content, several possibilities exist. We focus on
                      annealing in oxidising conditions and applying variable
                      strain with a piezoelectric substrate to the film.We grow
                      thin films of SrCoO2.5 by molecular beam epitaxy on SrTiO3
                      and LSAT substrates for investigations of oxygen annealing
                      induced transitions and 0.7(Pb(Mg1/3Nb2/3)O3)-0.3(PbTiO3)
                      (PMN-PT), a piezoelectric substrate, to study the
                      possibility of a strain dependent oxidation state.To be able
                      to successfully control the oxidation state and transfer
                      strain from the substrate to the film, a high sample quality
                      and epitaxy is mandatory. Thus, we present the results of
                      the film growth and quality, as well as first results of the
                      magnetic characterisation by SQUID and neutron reflectometry
                      for annealed and strained samples.[1] C.K. Xie et al., Appl.
                      Phys. Lett. 99, 2011 [2] H. Jeen et al., Nature Materials
                      12, 2013},
      month         = {Jun},
      date          = {2019-06-25},
      organization  = {5th International School of Oxide
                       Electronic, Cargese (France), 25 Jun
                       2019 - 5 Jul 2019},
      subtyp        = {After Call},
      cin          = {JCNS-FRM-II / JCNS-2 / ER-C-1 / PGI-4},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)ER-C-1-20170209 /
                      I:(DE-Juel1)PGI-4-20110106},
      pnm          = {524 - Controlling Collective States (POF3-524) / 6212 -
                      Quantum Condensed Matter: Magnetism, Superconductivity
                      (POF3-621) / 6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich
                      Centre for Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-524 / G:(DE-HGF)POF3-6212 /
                      G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)MARIA-20140101 / EXP:(DE-MLZ)MBE-MLZ-20151210},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/867753},
}