Ferroelectric Properties of PbZrO3&sngbnd;BiFeO3Solid Solutions
作者:
Robert Gerson,
Pen‐chu Chou,
W. J. James,
期刊:
Journal of Applied Physics
(AIP Available online 1967)
卷期:
Volume 38,
issue 1
页码: 55-60
ISSN:0021-8979
年代: 1967
DOI:10.1063/1.1709009
出版商: AIP
数据来源: AIP
摘要:
Solid solutions of BiFeO3and PbZrO3were investigated for crystallographic and dielectric properties. A new pseudocubic perovskite phase was found, which has been tentatively indexed as orthorhombic with the same unit cell as PbZrO3but with dielectric properties characteristic of a ferroelectric substance. The Curie point in this series of solid solutions has a minimum of about 155°C at a composition of about (PbZrO3)0.80(BiFeO3)0.20, which at room temperature lies on the boundary between the orthorhombic antiferroelectric and the pseudocubic ferroelectric phases. This composition has a relative dielectric constant of 800 at room temperature and shows appreciable dielectric nonlinearity. The Curie point rises to about 400°C for (PbZrO3)0.50(BiFeO3)0.50and is extrapolated to about 900°C for pure BiFeO3, in agreement with previous data from similar solid solutions. It is felt that this is additional evidence that the distortion from cubic symmetry in BiFeO3may be of ferroelectric origin.
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