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Relationships between macroscopic polarization hysteresis and local piezoresponse of fatigued Pb(Zr,Ti)O3 films within a Landau theory-based lattice model

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2 Author(s)
Ricinschi, Dan ; Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan ; Okuyama, Masanori

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Characterization of the fatigued state in Pb(Zr,Ti)O3 (PZT) films has been carried out by nanoscale piezoelectric displacements measured simultaneously with the macroscopic polarization hysteresis. For explaining the fatigue peculiarities of PZT films prepared by sol-gel and rf sputtering, a Landau theory-type model based on formation of degraded regions in a ferroelectric lattice has been used. The relevance of local piezoelectric loops for the macroscopic polarization hysteresis has been assessed and the possibility of recovering the latter as a weighted convolution of the former has been shown to depend on the film quality. © 2002 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:81 ,  Issue: 21 )