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Proceedings Paper

Effect of calcium doping on lattice parameters resulting in structural distortions of SrBi2Nb2O9 ferroelectric ceramics
Author(s): Vaibhav Shrivastava; A. K. Jha; R. G. Mendiratta
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Paper Abstract

Studies on the effect of 10 - 50 atomic % Ca doping on structural distortions are reported in the present work. Bismuth layered structured ferroelectrics oxides of the composition Sr1-xCaxBi2Nb2O9; with x = 0.0 - 0.5 were synthesized by the solid-state reaction method. X-ray diffraction analysis revealed the formation of perovskite ferroelectric ceramic sample and a few additional peaks were observed as concentration of calcium varied from 10 to 50%, gradual shift in peaks with doping is discussed with respect to observed anomalous change in lattice parameters. Also, transformation of structure from pseudo-orthorhombic to pseudo-tetragonal phase is observed at room temperature as concentration of calcium is increased. This suggests that structural distortions are pronounced in such a manner so as to stabilize the structure of unit cell, which may lead to high value of Curie temperature and remanent polarization useful in non-volatile random access memory (NvRAM) devices.

Paper Details

Date Published: 14 October 2003
PDF: 5 pages
Proc. SPIE 5062, Smart Materials, Structures, and Systems, (14 October 2003); doi: 10.1117/12.514895
Show Author Affiliations
Vaibhav Shrivastava, Delhi College of Engineering (India)
A. K. Jha, Delhi College of Engineering (India)
R. G. Mendiratta, Netaji Subhas Institute of Technology (India)

Published in SPIE Proceedings Vol. 5062:
Smart Materials, Structures, and Systems
S. Mohan; B. Dattaguru; S. Gopalakrishnan, Editor(s)

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