期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 47, 期 4, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/47/4/045004
关键词
multifunctional materials; ferromagnetism; perovskites; bismuth ferrite; magnetoelectric; BiFeO3; phase transition
资金
- Department of Science and Technology, Government of India
- Council of Scientific and Industrial Research (CSIR), India
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.
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