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@ARTICLE{MacLaren:189240,
      author       = {MacLaren, Ian and Wang, LiQiu and McGrouther, Damien and
                      Craven, Alan J. and McVitie, Stephen and Schierholz, Roland
                      and Kovács, András and Barthel, Juri and Dunin-Borkowski,
                      Rafal},
      title        = {{O}n the origin of differential phase contrast at a locally
                      charged and globally charge-compensated domain boundary in a
                      polar-ordered material},
      journal      = {Ultramicroscopy},
      volume       = {154},
      issn         = {0304-3991},
      address      = {Amsterdam},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2015-02428},
      pages        = {57 - 63},
      year         = {2015},
      abstract     = {Differential phase contrast (DPC) imaging in the scanning
                      transmission electron microscope is applied to the study of
                      a charged antiphase domain boundary in doped bismuth
                      ferrite. A clear differential signal is seen, which matches
                      the expected direction of the electric field at the
                      boundary. However, further study by scanned diffraction
                      reveals that there is no measurable deflection of the
                      primary diffraction disc and hence no significant free
                      E-field in the material. Instead, the DPC signal arises from
                      a modulation of the intensity profile within the primary
                      diffraction disc in the vicinity of the boundary.
                      Simulations are used to show that this modulation arises
                      purely from the local change in crystallographic structure
                      at the boundary and not from an electric field. This study
                      highlights the care that is required when interpreting
                      signals recorded from ferroelectric materials using both DPC
                      imaging and other phase contrast techniques.},
      cin          = {PGI-5 / IEK-9},
      ddc          = {570},
      cid          = {I:(DE-Juel1)PGI-5-20110106 / I:(DE-Juel1)IEK-9-20110218},
      pnm          = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000355018700009},
      doi          = {10.1016/j.ultramic.2015.03.016},
      url          = {https://juser.fz-juelich.de/record/189240},
}