Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/27058

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Title
Temperature-induced phase transitions in the giant-piezoelectric-effect material PZN-4.5%PT
Author/Creator
Forrester, J. S.;  Piltz, R. O.;  Kisi, E. H.;  McIntyre, G. J.
Description
Lead zinc niobate-lead titanate (PZN-PT) single crystals are able to sustain very large piezoelectric strains, a phenomenon for which the term 'giant piezoelectric effect' was recently coined. PZN-4.5%PT crystals were studied by means of single-crystal neutron diffraction at temperatures between 293 K and 438 K. Two phase transitions were observed. The first, from the room temperature rhombohedral perovskite structure (R3m) to the tetragonal lead titanate phase (P4mm) occurs at 391±2 K. The second, to the cubic perovskite aristotype, occurs at 421±2 K. These temperatures are at slight variance with the current phase diagram. The transitions are relatively abrupt, occurring over a range of only 2-3 K. A monoclinic phase recently reported to occur between the rhombohedral and tetragonal phases in the lead zirconate titanate system (PZT) does not occur here. Group theoretical analysis using the computer program ISOTROPY indicates that the intermediate monoclinic phase cannot facilitate a truly continuous transition from rhombohedral to tetragonal symmetry.
Relation
Journal of Physics: Condensed Matter Vol. 13, Issue 36, p. L825-L833
Publisher Link
http://dx.doi.org/10.1088/0953-8984/13/36/102
Date
2001
Publisher
Institute of Physics (IOP) Publishing
Keyword(s)
piezoelectric strains;  giant piezoelectric effect;  perovskite;  zirconate titanate system (PZT);  Lead zinc niobate-lead titanate (PZN-PT)
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/27058
Identifier
ISSN:0953-8984
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Subject
"Journal of Physics: Condensed Matter"
 
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