期刊
PHYSICA B-CONDENSED MATTER
卷 406, 期 6-7, 页码 1263-1266出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physb.2011.01.013
关键词
Ferroelectrics; Composites; Percolation; Dielectric tunability
资金
- Natural Science Foundation of China [50721001, 10874228, 50862007]
We report on exotic dielectric properties of composite materials consisting of traditional ferroelectric BaTiO3 and electronic ferroelectric LuFe2O4. The composites were synthesized by a simple ceramic processing method with properties that can be tailored by adjusting LuFe2O4 concentration. A percolative effect was observed at the volume fraction of similar to 0.26, which led to an abrupt increase in the dielectric permittivity. For composites with high LuFe2O4 fractions, a giant dielectric tunability was observed over a broad temperature interval, which is in strong contrast to traditional ferroelectrics. (C) 2011 Elsevier B.V. All rights reserved.
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