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@ARTICLE{Zbiri:11023,
      author       = {Zbiri, M. and Mittal, R. and Rols, S. and Su, Y. and Xiao,
                      Y. and Schober, H. and Chaplot, S.L. and Johnson, M. and
                      Chatterji, T. and Inoue, Y. and Matsuishi, S. and Hosono, H.
                      and Brückel, T.},
      title        = {{M}agnetic lattice dynamics of the oxygen-free {F}e{A}s
                      pnictides: {H}ow sensitive are phonons to magnetic
                      ordering?},
      journal      = {Journal of physics / Condensed matter},
      volume       = {22},
      issn         = {0953-8984},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {PreJuSER-11023},
      pages        = {315701},
      year         = {2010},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {To shed light on the role of magnetism on the
                      superconducting mechanism of the oxygen-free FeAs pnictides,
                      we investigate the effect of magnetic ordering on phonon
                      dynamics in the low-temperature orthorhombic parent
                      compounds, which present a spin density wave. The study
                      covers both the 122 (AFe(2)As(2); A = Ca, Sr, Ba) and 1111
                      (AFeAsF; A = Ca, Sr) phases. We extend our recent work on
                      the Ca (122 and 1111) and Ba (122) cases by treating,
                      computationally and experimentally, the 122 and 1111 Sr
                      compounds. The effect of magnetic ordering is investigated
                      through detailed non-magnetic and magnetic lattice dynamical
                      calculations. The comparison of the experimental and
                      calculated phonon spectra shows that the magnetic
                      interactions/ordering have to be included in order to
                      reproduce well the measured density of states. This
                      highlights a spin-correlated phonon behavior which is more
                      pronounced than the apparently weak electron-phonon coupling
                      estimated in these materials. Furthermore, there is no
                      noticeable difference between phonon spectra of the 122 Ba
                      and Sr, whereas there are substantial differences when
                      comparing these to CaFe(2)As(2) originating from different
                      aspects of structure and bonding.},
      keywords     = {J (WoSType)},
      cin          = {IFF-5 / IFF-4 / Jülich Centre for Neutron Science JCNS
                      (JCNS) ; JCNS / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB785 / I:(DE-Juel1)VDB784 /
                      I:(DE-Juel1)JCNS-20121112 / $I:(DE-82)080009_20140620$},
      pnm          = {BioSoft: Makromolekulare Systeme und biologische
                      Informationsverarbeitung / Großgeräte für die Forschung
                      mit Photonen, Neutronen und Ionen (PNI)},
      pid          = {G:(DE-Juel1)FUEK505 / G:(DE-Juel1)FUEK415},
      shelfmark    = {Physics, Condensed Matter},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:21399367},
      UT           = {WOS:000279996400012},
      doi          = {10.1088/0953-8984/22/31/315701},
      url          = {https://juser.fz-juelich.de/record/11023},
}