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Ferroelectrics Volume 469, 2014 - Issue 1: Proceedings of the International Workshop on Relaxor Ferroelectrics (IWRF-2013)
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Original Articles

Ferroelectric Phase Transition and Relaxor-Like Behavior of Loparite-(Ce)

E. A. PopovaSaint Petersburg State University, Department of Crystallography, St. Petersburg, Russia;A.F. Ioffe Physical Technical Institute RAS, 194021St. Petersburg, RussiaView further author information
,
V. G. ZalesskyA.F. Ioffe Physical Technical Institute RAS, 194021St. Petersburg, RussiaView further author information
,
V. N. YakovenchukNanomaterials Research Centre KSC RAS, 184209, Apatity, Murmansk reg., RussiaView further author information
,
S. V. KrivovichevSaint Petersburg State University, Department of Crystallography, St. Petersburg, Russia;Nanomaterials Research Centre KSC RAS, 184209, Apatity, Murmansk reg., RussiaView further author information
&
S. G. LushnikovSaint Petersburg State University, Department of Crystallography, St. Petersburg, Russia;A.F. Ioffe Physical Technical Institute RAS, 194021St. Petersburg, RussiaCorrespondence[email protected]
View further author information
Pages 130-137 | Received 05 Mar 2014, Accepted 10 Jun 2014, Published online: 13 Oct 2014
 
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Abstract

Results of dielectric and Raman spectroscopic studies of single crystals of loparite-(Ce), a mineral of the perovskite family, are presented. A ferroelectric phase transition in the vicinity of 157 K and relaxation contribution into the lattice dynamics of loparite-(Ce) were investigated. Temperature dependence of relaxation time in the range 150 – 400 K was obtained from the quasi-elastic light scattering measurements. This temperature dependence was found to be well described by the Arrhenius law. As analysis showed, the relaxation processes observed in our experiments were could be caused by the partial disordering of the crystal lattice.

Additional information

Funding

This study was supported by RSF grant (Project N 14-12-00257).

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