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29 March 2024
 
  » arxiv » cond-mat/0506132

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The Significance of the Burns Temperature in Relaxor PMN
S.A. Prosandeev ; S.B. Vakhrushev ; N.M. Okuneva ; P.A. Markovin ; I.P. Raevski ; I.N. Zaharchenko ; M.S. Prosandeeva ;
Date 6 Jun 2005
Subject Disordered Systems and Neural Networks | cond-mat.dis-nn
AbstractWe suggest considering the Burns temperature in lead containing relaxor ferroelectrics as the temperature, at which Pb becomes off-center and nearly randomly occupies positions around the center on a sphere with the radius, which increases with the temperature decrease. The significance of the Burns temperature, in this approach, is the crossover between the soft-mode and order-disorder dynamics. The lattice parameter, birefringence and neutron scattering experiments are analyzed in the light of this model.
Source arXiv, cond-mat/0506132
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