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@INPROCEEDINGS{Friese:1005622,
      author       = {Friese, Karen},
      title        = {{R}edetermination of the incommensurately modulated
                      magnetic structure of {C}r{A}s},
      reportid     = {FZJ-2023-01571},
      year         = {2023},
      abstract     = {Chromium arsenide (CrAs) is considered a model system in
                      which superconductivity and helimagnetism coexist.
                      Thesuperconductivity is induced by pressure and forms a
                      dome-like phase region with a maximum TC of 2.2 K at about 1
                      GPa. Thesuperconductivity occurs in the vicinity of an
                      antiferromagnetical phase of CrAs which is incommensurate
                      and described as adouble helix in the literature. This model
                      was first proposed on the basis of neutron powder
                      diffraction data and assuming ananalogous magnetic structure
                      as the one observed for MnP [1]. Since the model was in
                      reasonable agreement with the powderPage 18Monday, 20 March
                      2023diffraction data, it was henceforth considered to be
                      correct for CrAs. We have investigated the magnetic
                      structure of CrAs for thefirst time by means of neutron
                      high-pressure single-crystal diffraction in clamp cells. The
                      results clearly show that the establishedmodel of the
                      magnetic structure of CrAs is not in accordance with the
                      measured intensities and can be discarded. While our datado
                      not allow an unambiguous identification of one singular
                      model, we identify four candidate models based on a
                      stringent use ofgroup theoretical considerations and the
                      subsequent refinement using magnetic superspace groups with
                      the program Jana2006[2]. Details of these models will be
                      presented. Acknowledgments: This work was supported by the
                      BMBF under projectNo.05K19PA2. [1] H. Watanabe et.al., J.
                      Appl. Phys. 40,1128-1129 (1969). [2] V. Petricek et. al.,.
                      Z. Kristallogr. 229, 345-352(2014).},
      month         = {Mar},
      date          = {2023-03-19},
      organization  = {Eighth European Conference on Neutron
                       Scattering, TUM Department of
                       Mechanical Engineering and the new
                       Science Congress Center Munich
                       (Germany), 19 Mar 2023 - 23 Mar 2023},
      subtyp        = {Invited},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (FZJ) (POF4-6G4)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1005622},
}