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@ARTICLE{Rosn:173280,
      author       = {Rosén, E. and Schweika, W. and Meven, M. and Leo, N. R.
                      and Meier, D. and Fiebig, M. and Kuo, C.-Y. and Pi, T.-W.
                      and Hu, Z. and Valldor, M. and Reim, Johannes and Schmidt,
                      M.},
      title        = {{S}tructural invariance upon antiferromagnetic ordering in
                      geometrically frustrated swedenborgite, {C}a{B}a{C}o 2 {F}e
                      2 {O} 7},
      journal      = {Journal of applied crystallography},
      volume       = {47},
      number       = {6},
      issn         = {1600-5767},
      address      = {Copenhagen},
      publisher    = {Munksgaard},
      reportid     = {FZJ-2014-06691},
      pages        = {2038 - 2047},
      year         = {2014},
      abstract     = {Centimetre-sized single crystals of high-quality
                      CaBaCo2Fe2O7 were synthesized by the optical floating zone
                      technique. The metal-to-metal stoichiometry and oxygen
                      content were confirmed by spectroscopy and thermal reduction
                      experiments. The hexagonal symmetry P63mc (No. 186) well
                      describes the powder X-ray and neutron diffraction as well
                      as single-crystal neutron diffraction at all measured
                      temperatures. This symmetry is also consistent with optical
                      second harmonic generation data obtained between 10 and 295
                      K. However, a satisfactory structure description from
                      single-crystal neutron diffraction data needs an oxygen
                      split position. Specific heat, magnetic susceptibility and
                      powder neutron diffraction data indicate a magnetic phase
                      transition at TN = 159 K to an antiferromagnetic ground
                      state, but with a persisting hexagonal symmetry and
                      intrinsic geometric frustration.},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT / JCNS (München) ; Jülich
                      Centre for Neutron Science JCNS (München) ; JCNS-FRM-II},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$ /
                      I:(DE-Juel1)JCNS-FRM-II-20110218},
      pnm          = {422 - Spin-based and quantum information (POF2-422) / 424 -
                      Exploratory materials and phenomena (POF2-424) / 542 -
                      Neutrons (POF2-542) / 544 - In-house Research with PNI
                      (POF2-544) / 54G - JCNS (POF2-54G24)},
      pid          = {G:(DE-HGF)POF2-422 / G:(DE-HGF)POF2-424 /
                      G:(DE-HGF)POF2-542 / G:(DE-HGF)POF2-544 /
                      G:(DE-HGF)POF2-54G24},
      experiment   = {EXP:(DE-MLZ)HEIDI-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000345877900027},
      doi          = {10.1107/S1600576714023528},
      url          = {https://juser.fz-juelich.de/record/173280},
}