AC field induced polarization disordering in the ferroelectric phase of modified PZT ceramics

Q. Tan*, D. Viehland

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

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.

Original languageEnglish
Pages (from-to)231-236
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Volume481
StatePublished - 1998
Externally publishedYes
EventProceedings of the 1997 MRS Fall Symposium - Boston, MA, USA
Duration: 2 Dec 19975 Dec 1997

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