Ranjan, Rajeev ; Singh, Neelam ; Pandey, Dhananjai ; Siruguri, V. ; Krishna, P. S. R. ; Paranjpe, S. K. ; Banerjee, Alok (1997) Room temperature crystal structure and relaxor ferroelectric behavior of Pb0.5Ca0.5TiO3 Applied Physics Letters, 70 (24). pp. 3221-3223. ISSN 0003-6951
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Official URL: http://apl.aip.org/resource/1/applab/v70/i24/p3221...
Related URL: http://dx.doi.org/10.1063/1.119131
Abstract
Superlattice reflections observed for the first time in the room temperature powder neutron diffraction patterns of (Pb0.5Ca0.5)TiO3 (PCT50) are shown to arise due to an orthorhombic distortion (space group Pbnm) resulting from tilted TiO6 octahedra and off-center location of Pb2+/Ca2+. From a study of the temperature dependence of the real and imaginary parts of the dielectric constant at various frequencies, PCT50 is found to be a relaxor ferroelectric. It is proposed that the structural frustration introduced by the tilted octahedra may be responsible for the relaxor behavior.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| ID Code: | 27261 |
| Deposited On: | 10 Dec 2010 12:52 |
| Last Modified: | 05 Mar 2011 10:18 |
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