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@ARTICLE{Jia:188158,
      author       = {Jia, Chun-Lin and Jin, Lei and Wang, Dawei and Mi, Shao-Bo
                      and Alexe, Marin and Hesse, Dietrich and Reichlova, Helena
                      and Marti, Xavi and Bellaiche, Laurent and Urban, Knut},
      title        = {{N}anodomains and nanometer-scale disorder in multiferroic
                      bismuth ferrite single crystals},
      journal      = {Acta materialia},
      volume       = {82},
      issn         = {1359-6454},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2015-01619},
      pages        = {356 - 368},
      year         = {2015},
      abstract     = {We report on an investigation of state-of-the-art
                      flux-grown multiferroic bismuth ferrite (BiFeO3; BFO) single
                      crystals by transmission electron microscopy and electron
                      diffraction. The crystals were pre-characterized by
                      piezoresponse force microscopy, electrical resistance and
                      superconducting quantum interference device magnetization
                      measurements. The structurally highly perfect crystals show
                      a ferroelectric stripe domain structure characterized by a
                      domain width of 55 nm. Inside these domains an additional
                      contiguous nanodomain substructure occurs, consisting of
                      180° related domains, giving rise to satellite reflections
                      at View the MathML source121212-type positions along View
                      the MathML source〈110〉 directions in the electron
                      diffraction pattern corresponding to a characteristic length
                      in real space of 15.5 nm. Furthermore, we present the first
                      atomic-resolution study on the short-range order by
                      aberration-corrected transmission electron microscopy in
                      which all atoms including oxygen are imaged directly. By
                      measuring the –Fe–O–Fe– atom topology, bond angles
                      and atomic distances we derive the electrical dipole moment
                      as well as the magnitude of the magnetic moment on the
                      unit-cell level. The results evidence substantial atomic- to
                      nano-scale disorder. Both the nanodomain substructure as
                      well as the disorder should affect the subtle
                      magnetoelectric interactions in this material and thereby
                      impede the formation of long-range cycloidal spin ordering
                      which up to now was considered an intrinsic feature of the
                      magnetic properties of BiFeO3 single crystals. By Monte
                      Carlo simulation on the basis of a state-of-the-art
                      effective Hamiltonian we scrutinize certain aspects of the
                      phase formation behavior in the BFO system forming the
                      background of single-crystal growth. This study reveals a
                      very sluggish phase evolution behavior, which should make it
                      invariably difficult to obtain structurally fully
                      equilibrated single crystals.},
      cin          = {PGI-5},
      ddc          = {670},
      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:000347017800034},
      doi          = {10.1016/j.actamat.2014.09.003},
      url          = {https://juser.fz-juelich.de/record/188158},
}