Applied Magnetic Resonance

, Volume 17, Issue 2–3, pp 301–313 | Cite as

35Cl NQR and2H NMR analysis of the critical dynamics close to the displacive normal-incommensurate phase transition in an organic crystal

  • J. Etrillard
  • C. Meinel
  • C. Odin
  • H. Zimmermann
  • B. Toudic
  • J. C. Ameline


Nuclear magnetic resonance (NMR) experiments,35C1 nuclear quadrupole resonance (NQR) and2H NMR, have been performed close to the displacive normal-incommensurate phase transition in the organic crystal of bis-(4-chlorophenyl)-sulfone. Calculations using coherent neutron scattering results show that the soft-mode contribution cannot explain the rapid increase of the spin-lattice relaxation rates close to the transition temperature. Calculations of the spectral densities taking into account the existence of a central-peak phenomenon describe both35C1 NQR and2H NMR spin-lattice relaxation rates on approaching the phase transition. In this way, the width of the central peak can be estimated to be in the range of several gigahertz.


Nuclear Magnetic Resonance Central Peak Nuclear Quadrupole Resonance Soft Mode Incommensurate Phase 
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Copyright information

© Springer 1999

Authors and Affiliations

  • J. Etrillard
    • 1
  • C. Meinel
    • 2
  • C. Odin
    • 1
  • H. Zimmermann
    • 2
  • B. Toudic
    • 1
  • J. C. Ameline
    • 1
  1. 1.Groupe Matière Condensée et MatériauxUniversité de Rennes 1Rennes CedexFrance
  2. 2.AG MolekülkristalleMax-Planck-Institut für Medizinische ForschungHeidelbergGermany

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