Title :
Polarization fatigue in perovskite ferroelectric ceramics and thin-films
Author :
Chen, Jie ; Harmer, M.P. ; Smyth, D.M.
Author_Institution :
Dept. of Mater. Sci. & Eng., Lehigh Univ., Bethlehem, PA, USA
fDate :
30 Aug-2 Sep 1992
Abstract :
The ferroelectric polarization fatigue (loss of polarization with cycling) of donor- and acceptor-doped BaTiO3 ceramics and PZT (lead zirconate titanate) thin films have been investigated. Donor-doped BaTiO3 ceramics showed significantly improved fatigue characteristics compared with acceptor-doped materials. Enhanced fatigue properties were also observed in donor-doped PZT thin films. The electric-field-assisted migration of charged species within ferroelectric materials may be responsible for the degradation/fatigue behavior. The results obtained confirm the expectation that oxygen vacancies play an important role in degradation/fatigue under electric switching
Keywords :
barium compounds; ceramics; dielectric polarisation; fatigue; ferroelectric materials; ferroelectric switching; ferroelectric thin films; lead compounds; BaTiO3 ceramics; PZT thin films; PbZrO3TiO3; acceptor doped BaTiO3 ceramics; charged species; degradation/fatigue behavior; donor doped BaTiO3 ceramics; electric switching; electric-field-assisted migration; fatigue characteristics; ferroelectric polarization fatigue; perovskite ferroelectric ceramics; Ceramics; Degradation; Electrodes; Fatigue; Ferroelectric materials; Gold; Niobium; Polarization; Scanning electron microscopy; Thin films;
Conference_Titel :
Applications of Ferroelectrics, 1992. ISAF '92., Proceedings of the Eighth IEEE International Symposium on
Conference_Location :
Greenville, SC
Print_ISBN :
0-7803-0465-9
DOI :
10.1109/ISAF.1992.300637
