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Integrated Ferroelectrics
An International Journal
Volume 104, 2008 - Issue 1
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Original Articles

RELAXATIONAL PROPERTIES OF LAYERED FERROELECTRICS CaBi1.5 La0.5Nb2O9

SHIMING HUANG Laboratory of Waves & Microstructure Materials, Pohl Institute of Solid State Physics, Tongji University, Shanghai, 200092, China
,
MU GU Laboratory of Waves & Microstructure Materials, Pohl Institute of Solid State Physics, Tongji University, Shanghai, 200092, China
,
XIAOLIN LIU Laboratory of Waves & Microstructure Materials, Pohl Institute of Solid State Physics, Tongji University, Shanghai, 200092, China
,
BO LIU Laboratory of Waves & Microstructure Materials, Pohl Institute of Solid State Physics, Tongji University, Shanghai, 200092, China
&
CHEN NI Laboratory of Waves & Microstructure Materials, Pohl Institute of Solid State Physics, Tongji University, Shanghai, 200092, China
Pages 34-39 | Received 09 Oct 2008, Published online: 20 Sep 2010
 
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ABSTRACT

CaBi1.5La0.5Nb2O9 ceramics were prepared by a conventional solid-state reaction method. Their structure and dielectric properties were investigated. X-ray diffraction analysis indicated that single phase layered perovskites were obtained. Dielectric studies demonstrated that CaBi1.5La0.5Nb2O9 is characteristic of relaxor ferroelectrics. The dielectric relaxation of CaBi1.5La0.5Nb2O9 was modeled using the Vögel-Fulcher relationship, and the dielectric relaxation in CaBi1.5La0.5Nb2O9 is found to be analogous to a spin glass with thermally activated polarization fluctuations above a static freezing temperature.

ACKNOWLEDGMENTS

This work was supported by the Program for Young Excellent Talents in Tongji University.

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