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@ARTICLE{Guo:872530,
      author       = {Guo, H. and Zhao, L. and Schmidt, W. and Fernández-Díaz,
                      M. T. and Becker, Ch. and Melendez-Sans, A. and Peng, W. and
                      Zbiri, M. and Hansmann, P. and Komarek, A. C.},
      title        = {{M}ultiferroic properties of melanothallite {C}u 2 {OC}l 2},
      journal      = {Physical review materials},
      volume       = {3},
      number       = {12},
      issn         = {2475-9953},
      address      = {College Park, MD},
      publisher    = {APS},
      reportid     = {FZJ-2020-00050},
      pages        = {124405},
      year         = {2019},
      abstract     = {Here we report on P−E hysteresis loop measurements that
                      unravel the ferroelectric nature of melanothallite Cu2OCl2,
                      a new multiferroic material with high critical temperature.
                      Its spin structure was investigated by polarized and
                      unpolarized neutron scattering experiments which reveal a
                      cycloidal magnetic structure with vector chirality (magnetic
                      polarity) that can be inverted by opposite poling of the
                      sample with an inverted electric field. This shows that
                      Cu2OCl2 is a spin-induced ferroelectric material. Finally,
                      we show that the ferroelectric properties of Cu2OCl2 are
                      driven by the inverse Dzyaloshinskii-Moriya interaction
                      mechanism which is also able to predict the observed
                      direction of the ferroelectric polarization properly. The
                      origin of the noncollinear spin structure in melanothallite
                      are competing AFM-FM exchange couplings which we estimate
                      from a combined ab initio + cluster configuration
                      interaction calculation.},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT / JCNS-ILL},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$ / I:(DE-Juel1)JCNS-ILL-20110128},
      pnm          = {144 - Controlling Collective States (POF3-144) / 524 -
                      Controlling Collective States (POF3-524) / 6212 - Quantum
                      Condensed Matter: Magnetism, Superconductivity (POF3-621) /
                      6213 - Materials and Processes for Energy and Transport
                      Technologies (POF3-621) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-144 / G:(DE-HGF)POF3-524 /
                      G:(DE-HGF)POF3-6212 / G:(DE-HGF)POF3-6213 /
                      G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-Juel1)ILL-IN12-20150421},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000502803200003},
      doi          = {10.1103/PhysRevMaterials.3.124405},
      url          = {https://juser.fz-juelich.de/record/872530},
}