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

被引：0
|
作者：
D. Schaniel
J. Schefer
V. Petricek
M. Imlau
R. Pankrath
T. Granzow
T. Woike
机构：
[1] Laboratory for Neutron Scattering,
[2] ETH Zürich & PSI Villigen,undefined
[3] 5232 Villigen,undefined
[4] Switzerland,undefined
[5] Institute of Physics,undefined
[6] Academy of Sciences,undefined
[7] 18221 Praha 8,undefined
[8] Czech Republic,undefined
[9] Fachbereich Physik,undefined
[10] University of Osnabrück,undefined
[11] 49069 Osnabrück,undefined
[12] Germany,undefined
[13] Institute for Mineralogy and Geochemistry,undefined
[14] University at Cologne,undefined
[15] 50674 Köln,undefined
[16] Germany,undefined
来源：
Applied Physics A | 2002年 / 74卷
关键词：
PACS: 61.12.Ld; 61.44.Fw;
D O I：
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中图分类号：
学科分类号：
摘要：
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.
引用
收藏
页码：s963 / s965
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