The Significance of the Burns Temperature in Relaxor PMN

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We 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.
Report at IMF 2005, Brazil

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Disordered Systems and Neural Networks

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http://salesiana.dossiersoluciones.com/handle/123456789/26475

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0506132
 http://arxiv.org/abs/cond-mat/0506132

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arXiv