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@INPROCEEDINGS{Hutanu:840586,
      author       = {Hutanu, Vladimir and Sazonov, Andrew and Roth and Murakawa
                      and Tokura and Bordacs and Kezsmarki and Nafradi and Braden
                      and Stein and Baum and Oh,},
      title        = {{S}pherical neutron polarimetry in multiferroics under
                      external stimuli},
      volume       = {A70},
      issn         = {0108-7673},
      address      = {Oxford [u.a.]},
      publisher    = {Blackwell},
      reportid     = {FZJ-2017-08091},
      pages        = {C151},
      year         = {2014},
      abstract     = {Study of multiferroics, materials simultaneously having
                      more than one primary ferroic order parameter, is a hot
                      topic of mate rial sciences. The most extensively studied
                      class of these compounds is the family of magnetoelectric
                      multiferroics, where ferroelectricity can be induced by
                      various types of magnetic orderings via the relativistic
                      spin-orbit interaction. As a consequence of the cross
                      coupling between spins and electric polarization, the
                      spectacular control of the ferroelectric polarization by
                      external magnetic field and the manipulation of the magnetic
                      order via electric field can often be realized in these
                      systems. Depending on the symmet ry and microscopic
                      mechanism of the multiferroicity the coupling energy between
                      magnetic and electric ordering parameters can significantly
                      vary. Classical neutron diffraction often fails in the
                      precise determining of the complex magnetic structure in the
                      multiferroics due to the presence of the statistically
                      distributed domains in the macroscopic sample. Using
                      spherical neutron polarimetry (SNP), known also as 3D
                      polarization analysis, it is possible not only to precisely
                      determine the complex magnetic structure, but also to
                      investigate in-situ its evolution with external parameters
                      and to control the magnetic domains distribution under the
                      influence of the external electric or/and magnetic field.
                      Here we will present some SNP results on few different mu
                      ltiferroic materials. In some of them, e.g. square lattice
                      2D antiferromagnet Ba2CoGe2O7, even strong electric field
                      does not change the magnetic order. However rater week
                      magnetic field is sufficient to create a mono-domain
                      structure and to rotate spins in the plane. In other e.g.
                      incommensurate (spiral) magnetic structure of the TbMnO3,
                      solely electric field is sufficient to fully control the
                      chirality of the magnetic structure. In the case of Cr2O3
                      both electric and magnetic fields should be applied in
                      parallel in order to switch between the different
                      antiferromagnetic domains.},
      month         = {Aug},
      date          = {2014-08-05},
      organization  = {Twenty-Third Congress and General
                       Assembly of the International Union of
                       Crystallography, Montreal (Canada), 5
                       Aug 2014 - 12 Aug 2014},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / JCNS-2 / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {524 - Controlling Collective States (POF3-524) / 6212 -
                      Quantum Condensed Matter: Magnetism, Superconductivity
                      (POF3-621) / 6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich
                      Centre for Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-524 / G:(DE-HGF)POF3-6212 /
                      G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)POLI-HEIDI-20140101},
      typ          = {PUB:(DE-HGF)8},
      url          = {https://juser.fz-juelich.de/record/840586},
}