Cation arrangement in the complex perovskites and vibrational spectra

✍ Scribed by I. G. Siny; R. S. Katiyar; A. S. Bhalla

• Book ID: 101248597
• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 216 KB
• Volume: 29
• Category: Article
• ISSN: 0377-0486
• DOI: 10.1002/(sici)1097-4555(199805)29:5<385::aid-jrs250>3.0.co;2-f

✦ Synopsis

Vibrational spectrum analysis was used to study the cation arrangement in the complex perovskites. The transition from the ideal perovskite structure to complex compositions with a pair of the A or B cations, such as ABO 3 or leads to drastic changes in the Raman spectra. Correlation between a change in the A 1¿2 º A 1¿2 / BO 3 AB 1¿2 º B 1¿2 / O 3 , Raman spectra and the recent structure analysis by advanced direct methods is discussed for some important "modelÏ compounds, such as relaxor ferroelectrics (PST), (PMN) and PbSc 1¿2 Ta 1¿2 O 3 PbMg 1¿3 Nb 2¿3 O 3 (NBT) and the low-dielectric material (BMT).