期刊
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
卷 94, 期 12, 页码 4502-4506出版社
WILEY
DOI: 10.1111/j.1551-2916.2011.04780.x
关键词
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资金
- BRFFI [F11K-046, T10P-119]
- FCT [SFRH/BPD/42506/2007]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/42506/2007] Funding Source: FCT
The concentration range of the stability of polar (R3c) and antipolar phases in the Bi1-xRExFeO3 (RELa - Dy) solid solutions has been determined by X-ray study of the polycrystalline samples. Both polar and antipolar phases become less stable with a decrease of the rare earth ionic radii. It is stimulated by a reduction of the rare-earth ions polarizability with a decrease in ionic radii. The antipolar phase is characterized by a weak ferromagnetic state, whereas the polar one exhibits dominantly antiferromagnetic behavior near the polar-antipolar morphotropic boundary. The local piezoelectric response decreases with increase in antipolar phase content in the mixed polar-antipolar structural state. It is suggested that the piezoelectric activity is associated with polar (R3c) phase.
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