% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Schffmann:887898,
      author       = {Schöffmann, P. and Pütter, S. and Schubert, Jürgen and
                      Zander, W. and Barthel, J. and Zakalek, P. and Waschk, M.
                      and Heller, R. and Brückel, T.},
      title        = {{T}uning the {C}o/{S}r stoichiometry of {S}r{C}o{O}$_{2.5}$
                      thin films by {RHEED} assisted {MBE}growth},
      journal      = {Materials Research Express},
      volume       = {7},
      issn         = {2053-1591},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {FZJ-2020-04504},
      pages        = {116404},
      year         = {2020},
      abstract     = {Strontium cobaltite (SrCoO2.5+δ, SCO) is a fascinating
                      material because of its topotactic structural phase
                      transition caused by a change in oxygen stoichiometry. In
                      the brownmillerite phase (δ = 0) it is an insulating
                      antiferromagnet whereas in the perovskite phase (δ = 0.5)
                      it is a conducting ferromagnet. In contrast, the impact of
                      the varying Co/Sr stoichiometry on the structure has not yet
                      been studied in SCO thin films. Using molecular beam epitaxy
                      we have fabricated SCO thin films of varying Co/Sr
                      stoichiometry. Films with Co excess exhibit a brownmillerite
                      crystal structure with CoO precipitates within the thin film
                      and on the surface. Co deficient films are amorphous. Only
                      for 1:1 stoichiometry a pure brownmillerite structure is
                      present. We find a clear dependence of the Reflection High
                      Energy Electron Diffraction (RHEED) pattern of these thin
                      films on the stoichiometry. Interestingly, RHEED is very
                      sensitive to a Co excess of less than $12\%$ while x-ray
                      diffraction fails to reveal that difference. Hence, using
                      RHEED, the stoichiometry of SCO can be evaluated and tuned
                      in-situ to a high degree of precision, which allows for a
                      quick adjustment of the growth parameters during a sample
                      series.},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT / PGI-9 / ER-C-2 / JCNS-FRM-II},
      ddc          = {620},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$ / I:(DE-Juel1)PGI-9-20110106 /
                      I:(DE-Juel1)ER-C-2-20170209 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218},
      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},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000587061000001},
      doi          = {10.1088/2053-1591/abc58b},
      url          = {https://juser.fz-juelich.de/record/887898},
}