TY - JOUR
T1 - Coexistence of the critical slowing down and glassy freezing in relaxor ferroelectrics
AU - Vugmeister, B.
AU - Rabitz, H.
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2000
Y1 - 2000
N2 - We have developed a dynamical model for the dielectric response in relaxor ferroelectrics that explicitly takes into account the coexistence of the critical slowing down and glassy freezing. The application of the model to the experiment in (Formula presented) (PMN) allowed for the reconstruction of the nonequilibrium spin-glass state order parameter and its comparison with the results of recent NMR experiment [R. Blinc et al., Phys. Rev. Lett 83, 424 (1999)]. It is shown that the degree of the local freezing is rather small even at temperatures where the field-cooled permittivity exceeds the frequency-dependent permittivity by an order of magnitude. This observation indicates the significant role of the critical slowing down (accompanying the glass freezing) in the system dynamics. Also, the theory predicts an important interrelationship between the frequency-dependent permittivity and the zero-field-cooled permittivity, which proved to be consistent with the experiment in PMN [A. Levstik et al., Phys. Rev. B 57, 11 204 (1998)].
AB - We have developed a dynamical model for the dielectric response in relaxor ferroelectrics that explicitly takes into account the coexistence of the critical slowing down and glassy freezing. The application of the model to the experiment in (Formula presented) (PMN) allowed for the reconstruction of the nonequilibrium spin-glass state order parameter and its comparison with the results of recent NMR experiment [R. Blinc et al., Phys. Rev. Lett 83, 424 (1999)]. It is shown that the degree of the local freezing is rather small even at temperatures where the field-cooled permittivity exceeds the frequency-dependent permittivity by an order of magnitude. This observation indicates the significant role of the critical slowing down (accompanying the glass freezing) in the system dynamics. Also, the theory predicts an important interrelationship between the frequency-dependent permittivity and the zero-field-cooled permittivity, which proved to be consistent with the experiment in PMN [A. Levstik et al., Phys. Rev. B 57, 11 204 (1998)].
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U2 - 10.1103/PhysRevB.61.14448
DO - 10.1103/PhysRevB.61.14448
M3 - Article
AN - SCOPUS:0001336137
SN - 1098-0121
VL - 61
SP - 14448
EP - 14453
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 21
ER -