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@INPROCEEDINGS{Schffmann:863420,
      author       = {Schöffmann, Patrick and Pütter, Sabine and Schubert,
                      Jürgen and Palmen, Katja and Brückel, Thomas},
      title        = {{F}abrication and characterization of
                      {S}r{C}o{O}$_{3−𝛿}$ thin films},
      reportid     = {FZJ-2019-03490},
      year         = {2019},
      abstract     = {Because of its multivalent Co states and high oxygen
                      mobility SrCoO$_{3−𝛿}$ (SCO) is a promising material
                      for energy and spintronic applications [1]. Upon changing
                      its oxygen content it exhibits a topotactic phase
                      transition. While SrCoO$_3$ is a ferromagnetic metal
                      (T$_C$=305 K) with perovskite structure, SrCoO$_{2.5}$ is an
                      antiferromagnetic insulator(T$_N$ =570 K) with
                      brownmillerite structure.In this contribution, we focus on
                      the fabrication of SrCoO$_{2.5}$ thin films by molecular
                      beam epitaxy on various substrates like SrTiO$_3$ and
                      LaAlO$_3$. As Sr and Co are coevaporated from distinct
                      effusion cells, the first task is to obtain stoichiometric
                      thin films. We present results of RHEED assisted
                      stoichiometric thin film growth and of driving the
                      topotactic transition by annealing in low oxygen gas
                      flow.For bulk SCO it has been shown that the perovskite
                      structure can be stabilized by adding of about 5 \% rare
                      earth ions [2]. For this reason we study the effect of Sm
                      doping on the crystal structure of SCO thin films. The
                      magnetic properties were studied with SQUID and the
                      crystalline properties by surface characterization methods
                      like LEED, RHEED and XRR.[1] H. Jeen et al., Nature
                      Materials 12, (2013) 1057 [2] M. James et al., Solid State
                      Sciences 6 (2004) 655},
      month         = {Jun},
      date          = {2019-06-04},
      organization  = {MLZ Conference Neutrons for
                       Information and Quantum Technologies,
                       Lenggries (Germany), 4 Jun 2019 - 7 Jun
                       2019},
      subtyp        = {After Call},
      cin          = {JCNS-FRM-II / JCNS-2 / PGI-9},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-9-20110106},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
                      / 6G15 - FRM II / MLZ (POF3-6G15) / 6212 - Quantum Condensed
                      Matter: Magnetism, Superconductivity (POF3-621) / 524 -
                      Controlling Collective States (POF3-524)},
      pid          = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15 /
                      G:(DE-HGF)POF3-6212 / G:(DE-HGF)POF3-524},
      experiment   = {EXP:(DE-MLZ)MBE-MLZ-20151210},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/863420},
}