Diffuse dielectric anomaly in perovskite-type ferroelectric oxides in the temperature range of 400–700 °C
- 1 August 2003
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 94 (3), 1904-1911
- https://doi.org/10.1063/1.1589595
Abstract
The diffuse dielectric anomaly by the dielectric relaxation found at the high-temperature region of 400–700 °C was investigated in perovskite-type ferroelectric oxides such as and ceramics. We observed that the diffuse dielectric anomaly in perovskite oxides was strongly affected by oxygen-related processing parameters. We have modified the Debye relaxation equation by introducing the mobile dipole of the thermal motion of oxygen vacancies in order to explain the temperature-dependent behavior of the diffuse dielectric anomaly. A relationship between the dielectric polarization/relaxation and the electrical conduction by the thermal motion of oxygen vacancies was microscopically suggested to explain the origin of the diffuse dielectric anomaly found at 400–700 °C in perovskite-type ferroelectric oxides.
Keywords
This publication has 19 references indexed in Scilit:
- Diffuse Dielectric Anomaly in MnO2-doped Pb0.9La0.1TiO3 Ceramic in the Temperature Range of 400–700 °CJournal of Materials Research, 2002
- Dielectric relaxation in Pb0.9La0.1TiO3 ceramics in the temperature range of 400–700 °CApplied Physics Letters, 2002
- Dielectric relaxation in SrTiO3–SrMg1/3Nb2/3O3 and SrTiO3–SrSc1/2Ta1/2O3 solid solutionsApplied Physics Letters, 2000
- Oxygen-vacancy-related low-frequency dielectric relaxation and electrical conduction inPhysical Review B, 2000
- Dielectric relaxation processes in Cd2Nb2O7 compoundJournal of Applied Physics, 2000
- Bulk Conductivity and Defect Chemistry of Acceptor‐Doped Strontium Titanate in the Quenched StateJournal of the American Ceramic Society, 1991
- Coexistence of normal and diffuse ferroelectric-paraelectric phase transitions in (Pb,La)ceramicsPhysical Review B, 1990
- Defect Structure of PLZT Doped with Mn, Fe, and AlJournal of the American Ceramic Society, 1981
- Discussion of “Evaluation of Lattice Site and Valence of Mn and Fe in Polycrystalline PbTiO3 by Electron Spin Resonance and Thermogravimetry”Journal of the American Ceramic Society, 1975
- The distribution of vacancies in lanthana-doped lead titanatephysica status solidi (a), 1970