2001
DOI: 10.1063/1.1401802
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Dielectric spectroscopy of Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals

Abstract: Complex impedance spectroscopic data were acquired on single crystals of the morphotropic phase boundary composition of 0.68Pb(Mg1/3Nb2/3)O3-0.32PbTiO3 over a wide range of temperatures (25–525 °C) and frequencies 1 kHz–1 MHz. This study takes advantage of plotting ac data simultaneously in the form of impedance and modulus spectroscopic plots. This permits the easy interpretation of microscopic processes responsible for the measured ac response. Frequency explicit plots of imaginary components of impedance an… Show more

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Cited by 127 publications
(44 citation statements)
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“…Moreover, the frequency of the maximum, an apparent relaxation frequency, shifts to more high values with increasing of the temperature. This behavior has been reported for several single crystals 13,14 being evidence of actuation of a hopping type mechanism as small polaron hopping with gradual decrease of electron-lattice coupling.…”
Section: A Conductivity Analysismentioning
confidence: 80%
“…Moreover, the frequency of the maximum, an apparent relaxation frequency, shifts to more high values with increasing of the temperature. This behavior has been reported for several single crystals 13,14 being evidence of actuation of a hopping type mechanism as small polaron hopping with gradual decrease of electron-lattice coupling.…”
Section: A Conductivity Analysismentioning
confidence: 80%
“…Despite the great number of events that can be correlated to further explain the decentralization phenomenon, this phenomenon has been reported to occur in high-quality single crystals of complex sillenite 14 and in perovskite solid-solution 18 structure, as well as in functional glasses. 9,10 Therefore, this phenomenon is not intercorrelated a priori to some kind of quality factor of the material, but is an intrinsic feature of them.…”
Section: Resultsmentioning
confidence: 99%
“…The M /M max curves are overlap for all the temperatures into a single master curve, indicating that they describe the same mechanism at various temperatures relaxations. The temperature dependence of the characteristic relaxation time was determined and plotted in Figure 7 (d), which follows the Arrhenius law [31]. From the least square fitting, the activation energies are calculated, and are found to be 0.22 and 0.27 eV for Cr=10 and 15%, respectively.…”
Section: Dielectric Propertiesmentioning
confidence: 99%