Micro-Raman study of Ba1-xSrxTiO3 ceramics

A Raman spectroscopic study was performed to investigate Ba1-xSrxTiO3 ceram ics prepared using a solid-state reaction technique. A single-phase perovsk ite structure of the ceramics was verified and no mechanical stresses or gr ain size effects were identified within the sensitivity of the Raman micro- probe. The tetragonal to cubic transition temperature that was found to dec rease 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. Cop yright (C) 2001 John Wiley & Sons, Ltd.