% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@INPROCEEDINGS{Eich:873960,
      author       = {Eich, Andreas and Grzechnik, A. and Müller, Thomas and
                      Paulmann, C. and Friese, K.},
      title        = {{S}tructural and macroscopic investigation of {C}r{A}s at
                      low temperatures and high pressures},
      reportid     = {FZJ-2020-01123},
      year         = {2020},
      abstract     = {Chromium Arsenide (CrAs) is the first Cr-based
                      superconductor, exhibiting pressure-induced
                      superconductivity with a maximum Tc = 2.2 K at around 1 GPa
                      [1,2] and the dome-like shaped superconducting phase region
                      existing in the vicinity of a magnetically ordered state.
                      The magnetic structure is described as double helices
                      propagating along the c* direction with the spins in the
                      (a,b) plane. The first-order phase transition from the
                      helimagnetically ordered antiferromagnetic state to a
                      paramagnetic state is clearly and consistently observed in
                      our macroscopic measurements of magnetization, resistivity
                      and heat capacity at TN ≈ 267 K. The transition is
                      furthermore connected to an abrupt increase in unit cell
                      volume of about $2.4\%,$ though the symmetry of the crystal
                      structure (Pnma, Z = 4) does presumably not change [3].As
                      the understanding of the behaviour of the crystal structure
                      of CrAs so far is based primarily on powder data, the
                      objective of our work is to precisely determine the crystal
                      structure by single crystal diffraction at low temperatures
                      as well as at high pressures. This knowledge will serve as
                      base for further studies of the crystal and magnetic
                      structures of CrAs at simultaneously low temperatures and
                      high pressures, in particular within or in the vicinity of
                      the superconducting phase.For this, synchrotron x-ray
                      diffraction experiments were performed on single crystals
                      between 300 K and 20 K at ambient pressure, and between 0.92
                      GPa and 9.45 GPa at room temperature.The preliminary
                      refinements show a good agreement with the literature data
                      for the room temperature phase. Below the transition
                      temperature the symmetry Pnma is preserved and the
                      reflections can still be indexed with the orthorhombic cell,
                      although a deterioration of the crystal quality is
                      observed.[1] R.Y. Chen, N.L. Wang, Rep. Prog. Phys. 82,
                      012503 (2019)[2] W. Wu, et al., Nat. Commun. 5, 5508
                      (2014)[3] T. Suzuki, H. Ido, J. Appl. Phys. 69, 4624 (1991)},
      month         = {Feb},
      date          = {2020-02-24},
      organization  = {Joint Polish-German Crystallographic
                       Meeting 2020, Congress Center Wrocław
                       University of Science and Technology
                       (Poland), 24 Feb 2020 - 27 Feb 2020},
      subtyp        = {Invited},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT / JCNS-FRM-II},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$ /
                      I:(DE-Juel1)JCNS-FRM-II-20110218},
      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-MLZ)DNS-20140101},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/873960},
}