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@ARTICLE{Herlitschke:153769,
      author       = {Herlitschke, M. and Tchougréeff, A. L. and Soudackov, A.
                      V. and Klobes, B. and Stork, L. and Dronskowski, R. and
                      Hermann, Raphael},
      title        = {{M}agnetism and lattice dynamics of {F}e{NCN} compared to
                      {F}e{O}},
      journal      = {New journal of chemistry},
      volume       = {38},
      number       = {10},
      issn         = {1369-9261},
      address      = {London},
      publisher    = {RSC},
      reportid     = {FZJ-2014-03258},
      pages        = {4670-4677},
      year         = {2014},
      abstract     = {Three-dimensional non-oxidic extended frameworks offer the
                      possibility to design novel materials with unique
                      properties, which can be different from their oxide
                      analogues. Here, we present first experimental results
                      concerning unusual magnetic properties of FeNCN,
                      investigated using Mössbauer spectroscopy and magnetometry
                      between 5 and 380 K. This study reveals an unconventional
                      behaviour of the magnetic parameters below the Néel
                      temperature of 350 K, i.e., the hyperfine field on iron
                      decreases with decreasing temperature. At room temperature,
                      quadrupole and hyperfine magnetic field interaction energies
                      are comparable in magnitude, which leads to a rare five-line
                      absorption spectrum. We suggest that these features in the
                      hyperfine field are caused by the combination of a small
                      Fermi contact term and a temperature-dependent contribution
                      from the orbital momentum and the dipole term. One
                      additional spectral component is observed, which exhibits a
                      magnetic relaxation behaviour and slows down at low
                      temperatures to yield a sextet. The magnetometry data
                      suggest that the antiferromagnetic FeNCN is rich in
                      structural distortions, which results in a splitting of the
                      field-cooled and zero-field-cooled curves. The lattice
                      dynamics of FeNCN were investigated using nuclear inelastic
                      scattering. The comparison of the obtained data with
                      literature data of iron monoxide reveals very similar iron
                      phonon modes with a small softening and a slightly reduced
                      sound velocity.},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {424 - Exploratory materials and phenomena (POF2-424)},
      pid          = {G:(DE-HGF)POF2-424},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000342725800005},
      doi          = {10.1039/c4nj00097h},
      url          = {https://juser.fz-juelich.de/record/153769},
}