Correlation effects among thermal displacements of atoms in KBr

Neutron diffraction measurements have been performed on powder KBr at 7 and 298 K. An oscillatory diffuse scattering intensity is observed at 298 K. The oscillatory scheme of the diffuse scattering intensity is explained by the values of correlation effects which are almost the same as those in othe...

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Bibliographic Details
Published inSolid state ionics Vol. 192; no. 1; pp. 54 - 57
Main Authors Sakuma, Takashi, Xianglian, Shimizu, Norifumi, Mohapatra, Saumya R., Isozaki, Nobuhiro, Uehara, Hiroyuki, Takahashi, Haruyuki, Basar, Khairul, Igawa, Naoki, Kamishima, Osamu
Format Journal Article
LanguageEnglish
Published Elsevier B.V 16.06.2011
Subjects
Constants
Correlation
Correlation analysis
Correlation effects
Diffuse scattering
Diffusion
Diffusion effects
Dispersions
KBr
Neutron diffraction
Phonon
Scattering
KBr
Neutron diffraction
Diffuse scattering
Phonon
Correlation effects
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Summary:Neutron diffraction measurements have been performed on powder KBr at 7 and 298 K. An oscillatory diffuse scattering intensity is observed at 298 K. The oscillatory scheme of the diffuse scattering intensity is explained by the values of correlation effects which are almost the same as those in other ionic crystals. The value of the correlation effects as suggested by earlier studies using EXAFS measurement cannot explain the observed diffuse scattering intensity. Force constants among first, second and third nearest neighboring atoms are obtained from the correlation effects and used to estimate the phonon dispersion curves by computer simulation.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0167-2738
1872-7689
DOI:10.1016/j.ssi.2010.03.002