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@ARTICLE{Zhao:838625,
      author       = {Zhao, L. and Guo, H. and Schmidt, W. and Nemkovskiy, Kirill
                      and Mostovoy, M. and Komarek, A. C.},
      title        = {{M}agnetically induced ferroelectricity in
                      {B}i$_2${C}u{O}$_4$},
      journal      = {Physical review / B},
      volume       = {96},
      number       = {5},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2017-07202},
      pages        = {054424},
      year         = {2017},
      abstract     = {The tetragonal copper oxide Bi2CuO4 has an unusual crystal
                      structure with a three-dimensional network of well separated
                      CuO4 plaquettes. The spin structure of Bi2CuO4 in the
                      magnetically ordered state below TN∼43 K remains
                      controversial. Here we present the results of detailed
                      studies of specific heat, magnetic, and dielectric
                      properties of Bi2CuO4 single crystals grown by the floating
                      zone technique, combined with the polarized neutron
                      scattering and high-resolution x-ray measurements. Down to
                      3.5 K our polarized neutron scattering measurements reveal
                      ordered magnetic Cu moments which are aligned within the ab
                      plane. Below the onset of the long range antiferromagnetic
                      ordering we observe an electric polarization induced by an
                      applied magnetic field, which indicates inversion symmetry
                      breaking by the ordered state of Cu spins. For the magnetic
                      field applied perpendicular to the tetragonal axis, the
                      spin-induced ferroelectricity is explained in terms of the
                      linear magnetoelectric effect that occurs in a metastable
                      magnetic state. A relatively small electric polarization
                      induced by the field parallel to the tetragonal axis may
                      indicate a more complex magnetic ordering in Bi2CuO4.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / JCNS-2 / JCNS-ILL},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)JCNS-ILL-20110128},
      pnm          = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)DNS-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000407924600002},
      doi          = {10.1103/PhysRevB.96.054424},
      url          = {https://juser.fz-juelich.de/record/838625},
}