Applied Physics A

, Volume 74, Supplement 1, pp s963–s965 | Cite as

Superspace approach applied to a neutron-diffraction study of the holographic data storage material Sr0.61Ba0.39Nb2O6

  • D. Schaniel
  • J. Schefer
  • V. Petricek
  • M. Imlau
  • R. Pankrath
  • T. Granzow
  • T. Woike

Abstract.

We investigated the incommensurately modulated structure of Sr0.61Ba0.39Nb2O6 by means of single-crystal neutron diffraction. With the measured 620 satellite reflections we could verify the two modulation vectors Q1,2=(0.3075,±0.3075,0.5)known from X-ray-diffraction experiments. As neutrons are much more sensitive to oxygen atoms than X-rays, we performed structural refinement of the oxygen atoms using the superspace approach. The largest amplitude for positional modulation was found for those oxygen atoms lying in the same plane (z=const.) as the Sr and Ba atoms. The final R values for main and satellite reflections are 0.063 and 0.153, respectively.

PACS: 61.12.Ld; 61.44.Fw 

Copyright information

© Springer-Verlag 2002

Authors and Affiliations

  • D. Schaniel
    • 1
  • J. Schefer
    • 1
  • V. Petricek
    • 2
  • M. Imlau
    • 3
  • R. Pankrath
    • 3
  • T. Granzow
    • 4
  • T. Woike
    • 4
  1. 1.Laboratory for Neutron Scattering, ETH Zürich & PSI Villigen, 5232 Villigen, SwitzerlandCH
  2. 2.Institute of Physics, Academy of Sciences, 18221 Praha 8, Czech RepublicCZ
  3. 3.Fachbereich Physik, University of Osnabrück, 49069 Osnabrück, GermanyDE
  4. 4.Institute for Mineralogy and Geochemistry, University at Cologne, 50674 Köln, GermanyDE

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