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Stabilization of metastable tetragonal phase in a rhombohedral magnetoelectric multiferroic BiFeO3-PbTiO3

Siddaramanna, Ashoka and Kothai, V and Srivastava, Chandan and Ranjan, Rajeev (2014) Stabilization of metastable tetragonal phase in a rhombohedral magnetoelectric multiferroic BiFeO3-PbTiO3. In: JOURNAL OF PHYSICS D-APPLIED PHYSICS, 47 (4).

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Official URL: http://dx.doi.org/10.1088/0022-3727/47/4/045004

Abstract

The phase formation behaviour of the magnetoelectric multiferroic 0.8BiFeO(3)-0.2PbTiO(3) was studied as a function of heat treatment at different temperatures of a sol-gel derived powder. While under ordinary synthesis conditions this composition exhibits antiferromagnetic ordering and a rhombohedral structure; the sol-gel-enabled low-temperature synthesis could stabilize a tetragonal metastable phase along with the stable rhombohedral phase, mimicking a morphotropic phase boundary state. The phase coexistence state exhibits relatively enhanced ferromagnetic correlation. The same system with a relatively higher PbTiO3 concentration, 0.65BiFeO(3)-0.35PbTiO(3), on the other hand, exhibits a rhombohedral metastable phase. These results suggest that the occurrence of metastable phases is a very common feature in the BiFeO3-PbTiO3 magnetoelectric ferroelectric system and that it affects the ferroelectric and magnetic properties of system quite remarkably.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the IOP PUBLISHING LTD,ENGLAND
Keywords: multifunctional materials; ferromagnetism; perovskites; bismuth ferrite; magnetoelectric; BiFeO3; phase transition
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 11 Feb 2014 10:13
Last Modified: 11 Feb 2014 10:13
URI: http://eprints.iisc.ac.in/id/eprint/48361

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