New Phase Transitions in Perovskite Oxides: BiFeO<sub>3</sub>, SrSnO<sub>3</sub>, and Pb(Fe<sub>2/3</sub>W<sub>1/3</sub>)<sub>1/2</sub>Ti<sub>1/2</sub>O<sub>3</sub>

Scott, J. F. and Palai, R. and Kumar, A. and Singh, M. K. and Murari, N. M. and Karan, N. K. and Katiyar, R. S. (2008) New Phase Transitions in Perovskite Oxides: BiFeO<sub>3</sub>, SrSnO<sub>3</sub>, and Pb(Fe<sub>2/3</sub>W<sub>1/3</sub>)<sub>1/2</sub>Ti<sub>1/2</sub>O<sub>3</sub>. Journal of the American Ceramic Society, 91 (6). pp. 1762-1768. DOI

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This paper reports on two new aspects of oxide perovskites: the first part is devoted to new phase transitions, especially at high temperatures; multiferroics such as BiFeO3 and Pb–Fe–W–titanate are emphasized but nonmagnetic materials such as SrSnO3 are included. The work summarized on bismuth ferrite emphasizes its metal–insulator transition near 1200 K (atmospheric pressure) and 47 GPa (room temperature); that on SrSnO3 emphasizes order–disorder phase transitions; and that on lead–iron tungstate–titanate exhibits a classic second-order ferroelectric phase transition, of which rather few are known in the literature. The second part of the paper presents a discussion of constant phase elements for oxide perovskite ceramics; this is a modern way of characterizing their dielectric relaxation, particularly near phase transition temperatures.

Item Type: Article
Uncontrolled Keywords: 08AREP IA56 2008 P
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
Journal or Publication Title: Journal of the American Ceramic Society
Volume: 91
Page Range: pp. 1762-1768
Identification Number:
Depositing User: Sarah Humbert
Date Deposited: 16 Feb 2009 13:03
Last Modified: 23 Jul 2013 10:08

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