Dielectric characteristics of Ce3+ doped Sr0.61Ba0.39Nb2O6 with Cole-Cole plots technique by E. Sentürk

Crystal Research and Technology

Cryst. Res. Technol. 39, 157 (2004) - Abstract -

Dielectric characteristics of Ce³⁺ doped Sr_0.61Ba_0.39Nb₂O₆ with Cole-Cole plots technique

E. Sentürk

Department of Physics, Gebze Institute of Technology, Gebze, 41400, Kocaeli, Turkey

Keywords	Cole-Cole plots, dielectric relaxation, ferroelectrics
PACS	77.80.B, 77.20.C, 61.44.F
DOI	10.1002/crat.200310164

In this paper, we have investigated two-relaxator mechanism and dielectric characteristics of Ce³⁺ doped Sr_0.61Ba_0.39Nb₂O₆ with dielectric spectroscopy measurements. The crystal undergoes a ferroelectric phase transition at 340 K. The temperature dependence of the real and imaginer part of the complex dielectric susceptibility in vicinity of ferroelectric-paraelectric phase transition has been studied in the frequency region 0.1 kHz – 10 MHz. The measurements of the dielectric constant of the real and imaginer parts show strongly frequency dependence. The investigations of the dielectric constant revealed a non-Debye type dielectric relaxation for Ce³⁺ doped SBN61 by using Cole-Cole plots. It reveals the coexistence of the two dielectric relaxators in vicinity of the phase transition.

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