Successive paraelectric-antiferroelectric-ferroelectric phase transitions in highly ordered perovskite lead ytterbium tantalate
- 1 February 1993
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 62 (5) , 535-537
- https://doi.org/10.1063/1.109617
Abstract
Dielectric properties such as the permittivity, dielectric loss tangent and spontaneous polarization of highly ordered perovskite Pb(Yb1/2Ta1/2)O3 (PYT) compound which were prepared through the wolframite phase oxide were investigated. A dielectric anomaly which is characterized by a slight dielectric dispersion was found at a temperature Tm (e.g., Tm; 177 and 183 °C at 1 and 100 kHz, respectively). At temperatures below Tm, polarization P-electric field E hysteresis loops were observed, and then ferroelectricity in antiferroelectric ordered perovskite PYT was confirmed. Highly ordered PYT has two successive paraelectric-antiferroelectric-ferroelectric phase transitions, similar to highly ordered perovskite lead cobalt tungstate (PCW).Keywords
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