Role of defect distributions and mobility on ferroelectric phase transformations in lead zirconate titanate

Journal Article · Fri Aug 01 04:00:00 EDT 1997 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.119728· OSTI ID:664441

Tan, Q; Xu, Z; Li, J; Viehland, D ^[1]

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1. Department of Materials Science and Engineering and Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)

Studies of the influence of defect distributions and mobility on ferroelectric phase transformations in lead zirconate titanate have been performed by transmission electron microscopy, high resolution electron microscopy, polarization switching measurements, and dielectric spectroscopy. Investigations focused on La{sup 3+} and K{sup 1+} modified lead zirconate titanates. Defects which could be randomly quenched-in from temperatures significantly above that of the ferroelectric phase transformation resulted in relaxor ferroelectric behavior characterized by polar nanodomains. However, defects which remained mobile until temperatures significantly below that of the phase transformation resulted in a normal ferroelectric state which was characterized by domain pinning. Mobile impurities/vacancies are revealed to order into chain fragments or clusters which diffuse to domain boundaries resulting in a pinning of the boundaries on cooling. {copyright} {ital 1997 American Institute of Physics.}

• Research Organization: University of Illinois
• DOE Contract Number: FG02-91ER45439
• OSTI ID: 664441
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 8 Vol. 71; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL DEFECTS
DIFFUSION
DOMAIN STRUCTURE
FERROELECTRIC MATERIALS
LEAD COMPOUNDS
PHASE TRANSFORMATIONS
POLARIZATION
PZT
TEMPERATURE DEPENDENCE
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION