Ranjan, Rajeev ; Pandey, Dhananjai ; Siruguri, V. ; Krishna, P. S. R. ; Paranjpe, S. K. (1999) Novel structural features and phase transition behaviour of (Sr1-xCax)TiO3: I. Neutron diffraction study Journal of Physics: Condensed Matter, 11 (10). pp. 2233-2246. ISSN 0953-8984
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Official URL: http://iopscience.iop.org/0953-8984/11/10/010
Related URL: http://dx.doi.org/10.1088/0953-8984/11/10/010
Abstract
Superlattice reflections observed for the first time in the room temperature powder neutron diffraction patterns of SCTSr1-xCax)TiO3, x ≥ 0.12 are shown to arise due to tilting of TiO6 octahedra. Rietveld refinement of the neutron diffraction data confirms that the structure of SCT for x ≥ 0.12 is orthorhombic similar to that of CaTiO3. Implications of the presence of tilted TiO6 octahedra and the associated off-centre displacements of Sr3+/Ca2+ in SCT are discussed in detail with regard to the quantum ferroelectric behaviour of SCT at low temperatures. Structural phase transitions in SCT with x = 0.06 and 0.12 are also reported.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Institute of Physics Publishing. |
| ID Code: | 27201 |
| Deposited On: | 10 Dec 2010 12:58 |
| Last Modified: | 05 Mar 2011 10:17 |
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