Relaxation and freezing of dielectric response in relaxor Pb(Mg1/3Nb2/3)O3 crystal

Abstract

Dielectric investigations of the relaxor ferroelectric Pb(Mg1/3Nb2/3)O3 crystal were performed in the frequency domain at 10^(-4) 10^5 Hz. In the ergodic relaxor phase two overlapping relaxation processes obeying the Kohlrausch-Williams-Watts law, exp[-(t/tau)^beta], and the Curievon Schweidler law, t^(-n), respectively, were found and parameterized. The values of beta, n and 1/tau tend to zero at 211 K following the Vogel-Fulcher law, pointing to the glassy freezing of the dipole dynamics related to both relaxation processes.

arXiv commentPDF file, 7 pages, 4 figures collected on pp. 4-6

References in corpus (2)

• A Neutron Elastic Diffuse Scattering Study of PMN
• Universal relaxor polarization in Pb(Mg1/3Nb2/3)O3 and related materials

Cited by in corpus (4)

• Spatially Resolved Mapping of Local Polarization Dynamics in an Ergodic Phase of Ferroelectric Relaxor
• Insight into dielectric response of ferroelectric relaxors by statistical modeling
• First-principles studies of the local structure and relaxor behavior of Pb(Mg${}_{1/3}$Nb${}_{2/3}$)O${}_3$-PbTiO${}_3$-derived ferroelectric perovskite solid solutions
• Macroscopic polarization in the nominally ergodic relaxor state of lead magnesium niobate