Molecular dynamics in triglycine sulphate by cold neutron spectroscopy

  • Tripadus V
  • Radulescu A
  • Pieper J
 et al. 
  • 1

    Readers

    Mendeley users who have this article in their library.
  • 7

    Citations

    Citations of this article.

Abstract

Molecular dynamics of the ferroelectric compound triglycine sulphate (TGS) was studied by quasi-elastic neutron scattering. From among the three glycine molecules forming the unit cell the non-planar GI molecule is responsible for the polarisation which occurs in crystal and for the order-disorder ferroelectric phase transition at Tc= 49°C. This molecule also shows a complex dynamics much faster than that performed by the other glycine molecules. The key group of this molecule is the amino group that, on one hand, seems to be responsible for the phase transition and, on the other hand, performs motional processes spread on a wide time scale. These motions have been detailed studied by means of different energy resolution windows within the quasi-elastic scattering range. We found that the dynamics of this group develops in a restricted spatial volume and consists in a faster rotational diffusion around the molecular axis of the group and a slower flipping dynamics between two symmetrical positions on both sides of a mirror plane containing the molecular axis of GI molecule. © 2005 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Dynamics in restricted volumes
  • Ferroelectrics
  • Neutron scattering

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • V. Tripadus

  • A. Radulescu

  • J. Pieper

  • A. Buchsteiner

  • A. Podlesnyak

  • S. Janssen

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free