Micro-Raman study of Ba1-xSrxTiO3 ceramics

A Raman spectroscopic study was performed to investigate Ba1-xSrxTiO3 ceramics prepared using a solid-state reaction technique. A single-phase perovskite structure of the ceramics was verified and no mechanical stresses or grain size effects were identified within the sensitivity of the Raman micro-probe. The tetragonal to cubic transition temperature that was found to decrease linearly from 137 to 7 degreesC with increasing Sr content from x = 0.00 to x = 0.35 corroborated the dielectric results on single crystals. Copyright (C) 2001 John Wiley & Sons, Ltd.