X-ray diffraction and dielectric properties of Fe3+ substituted Pb(Yb1/2Ta1/2)O-3
- Authors
- Youn, S.C.; Koh, K.S.; Choo, W.K.
- Issue Date
- 2002
- Publisher
- TAYLOR & FRANCIS LTD
- Keywords
- complex perovskite; structure transformation; diffuse phase transition
- Citation
- FERROELECTRICS, v.272, pp 2319 - 2324
- Pages
- 6
- Journal Title
- FERROELECTRICS
- Volume
- 272
- Start Page
- 2319
- End Page
- 2324
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/66191
- ISSN
- 0015-0193
1563-5112
- Abstract
- The crystal structure and phase transition of (1-x)Pb(Yb1/2Ta1/2)O(3)xPb(Fe1/2Ta1/2)O-3(PYT1-xPFTx) solid solutions for 0less than or equal toxless than or equal to0.25 have been studied by X-ray diffraction and the dielectric constant measurement. From the analysis of the superlattice structure of the (PYT1-xPFTx) solid solutions, it is found that the crystal structure of PYT1-xPFTx changes from the monoclinic to the pseudocubic as x increases beyond x=0.20 at room temperature. In the composition region (xless than or equal to0.20), the dielectric constant vs. temperature curve exhibits a sharp normal paraelectricantiferroelectric phase transition. For xgreater than or equal to0.05, dielectric dispersion at 177degreesC which is the secondary phase transition point of PYT disappears. Beyond x=0.20, the dielectric constant vs. temperature curve shows significant broadening, but no relaxor behavior has been detected.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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