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@ARTICLE{Migunov:189144,
      author       = {Migunov, Vadim and London, A. and Farle, M. and
                      Dunin-Borkowski, Rafal},
      title        = {{M}odel-independent measurement of the charge density
                      distribution along an {F}e atom probe needle using off-axis
                      electron holography without mean inner potential effects},
      journal      = {Journal of applied physics},
      volume       = {117},
      number       = {13},
      issn         = {1089-7550},
      address      = {Melville, NY},
      publisher    = {American Inst. of Physics},
      reportid     = {FZJ-2015-02344},
      pages        = {134301},
      year         = {2015},
      abstract     = {The one-dimensional charge density distribution along an
                      electrically biased Fe atom probe needle is measured using a
                      model-independent approach based on off-axis electron
                      holography in the transmission electron microscope. Both the
                      mean inner potential and the magnetic contribution to the
                      phase shift are subtracted by taking differences between
                      electron-optical phase images recorded with different
                      voltages applied to the needle. The measured one-dimensional
                      charge density distribution along the needle is compared
                      with a similar result obtained using model-based fitting of
                      the phase shift surrounding the needle. On the assumption of
                      cylindrical symmetry, it is then used to infer the
                      three-dimensional electric field and electrostatic potential
                      around the needle with ∼10 nm spatial resolution,
                      without needing to consider either the influence of the
                      perturbed reference wave or the extension of the projected
                      potential outside the field of view of the electron
                      hologram. The present study illustrates how a
                      model-independent approach can be used to measure local
                      variations in charge density in a material using electron
                      holography in the presence of additional contributions to
                      the phase, such as those arising from changes in mean inner
                      potential and specimen thickness.},
      cin          = {PGI-5},
      ddc          = {530},
      cid          = {I:(DE-Juel1)PGI-5-20110106},
      pnm          = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000352645100030},
      doi          = {10.1063/1.4916609},
      url          = {https://juser.fz-juelich.de/record/189144},
}