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AC Field Induced Polarization Disordering in The Ferroelectric Phase Of Modified Pzt Ceramics

Published online by Cambridge University Press:  10 February 2011

Q. Tan  and
D. Viehland
Q. Tan
Affiliation:
Dept. of Materials Science and Engineering, Univ. of Illinois at Urbana-Champaign, 105 S. Goodwin Ave., Urbana, IL 61801
D. Viehland
Affiliation:
Dept. of Materials Science and Engineering, Univ. of Illinois at Urbana-Champaign, 105 S. Goodwin Ave., Urbana, IL 61801
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Abstract

Pronounced nonlinear enhancements in dielectric responses and decreases in phase transformation temperatures were induced under moderate ac fields and high field cycling for La modified lead zirconate titanate (PZT) ceramics. Polarization disordering could be inhibited by introducing acceptor dopants into La modified PZT compositions and by DC bias field. Analysis of the frequency dispersion revealed that the field driven transformation in lower La content PZT is a field assisted activation process, while the transformation in higher La content PZT relaxors is intrinsically a thermal activated process.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 481: Symposium P – Science and Technology of Semiconductor Surface Preparation , 1997 , 231
Copyright
Copyright © Materials Research Society 1998

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