Nano-sized polar clusters with tetragonal symmetry in PbTiO3-based relaxor ferroelectrics

✍ Scribed by Hyun M. Jang; Tae-Yong Kim; Il-Woo Park

• Book ID: 104166299
• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 142 KB
• Volume: 127
• Category: Article
• ISSN: 0038-1098
• DOI: 10.1016/s0038-1098(03)00564-7

✦ Synopsis

The behavior of nanometer-sized polar clusters is considered to be of central importance to the understanding of relaxor ferroelectricity. The size of the polar clusters with tetragonal symmetry in PbTiO 3 -based relaxors was estimated by analyzing the degree of asymmetric Raman line broadening. It was shown that the mean size ðLÞ of the tetragonal polar clusters remained essentially constant with L approximately 1.2 nm for temperatures above 300 K. The estimated L increases rapidly below a certain critical temperature, suggesting a rapid growth of the frozen polar clusters with the same tetragonal symmetry.