Vacancy defects in (Pb, La)(Zr, Ti)O{sub 3} capacitors observed by positron annihilation
- Carnegie Laboratory of Physics, University of Dundee, Dundee DD1 4HN (United Kingdom)
- Division of Materials Science, Brookhaven National Laboratory, Upton, New York 11793 (United States)
- Department of Materials Science and Nuclear Engineering, University of Maryland, College Park, Maryland 20742 (United States)
- Army Research Laboratory, Adelphi, Maryland 20783 (United States)
A study of vacancy-related defects in ferroelectric capacitors was performed using a variable energy positron beam (VEPB). Heterostructures of (Pb{sub 0.9}La{sub 0.1})(Zr{sub 0.2}Ti{sub 0.8})O{sub 3} (PLZT) ferroelectric with La{sub 0.5}Sr{sub 0.5}CoO{sub 3} (LSCO) electrodes were deposited by pulsed laser deposition and the effects of oxygen deficiency studied using structures grown with 760 and 1{times}10{sup {minus}5}thinspTorr oxygen. The VEPB depth profile showed an increase in vacancy-related defects with increased oxygen nonstoichiometry. A study of LSCO and PLZT thin films was also performed. The formation of vacancy clusters in the LSCO top electrode, and V{sub Pb}{minus}V{sub O} defects in the PLZT layer, with increased oxygen deficiency is inferred. {copyright} {ital 1998 American Institute of Physics.}
- OSTI ID:
- 639045
- Journal Information:
- Applied Physics Letters, Vol. 73, Issue 3; Other Information: PBD: Jul 1998
- Country of Publication:
- United States
- Language:
- English
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