Effects of quenched impurities and relative antiferroelectric/ferroelectric phase stability on the incommensurately modulated polar structures of La-modified lead zirconate titanate

Journal Article · Wed Oct 01 00:00:00 EDT 1997 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.120050· OSTI ID:543744

Xu, Z; Dai, X H; Li, J F; Viehland, D ^[1]

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

Structure{endash}property relationship studies have been performed in the La-modified lead zirconate titanate (PLZT) solution as a function of quenched La impurity content and Zr/Ti ratio. For Zr/Ti ratios of 90/10 and 85/15, an incommensurate antiferroelectric state was found to be stabilized with increasing La content. Temperature-dependent investigations demonstrated that the incommensurate structure becomes pinned into long-time metastable states, rather than transforming to a commensurate phase. Also, the modulation wavelength ({lambda}) was found to increase significantly with the decreasing Zr/Ti ratio and decreasing La content. The results of this study clearly demonstrate that the incommensurately modulated polar structures of PLZT are dependent on the relative antiferroelectric/ferroelectric phase stability, and the concentration of quenched La impurities. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 543744
• Journal Information: Applied Physics Letters, Vol. 71, Issue 16; Other Information: PBD: Oct 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
PZT
PHASE STABILITY
LANTHANUM COMPOUNDS
LEAD COMPOUNDS
FERROELECTRIC MATERIALS
ANTIFERROELECTRIC MATERIALS
IMPURITIES
CRYSTAL STRUCTURE
DOPED MATERIALS
LANTHANUM ADDITIONS
TEMPERATURE DEPENDENCE