Micro‐Raman study of Ba_{1 − <i>x</i>}Sr_<i>x</i>TiO₃ ceramics

Abstract

Abstract A Raman spectroscopic study was performed to investigate Ba 1− x Sr x TiO 3 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 °C with increasing Sr content from x = 0.00 to x = 0.35 corroborated the dielectric results on single crystals. Copyright © 2001 John Wiley &amp; Sons, Ltd.