Hysteresis relaxation in (Pb,La)(Zr,Ti)O3 thin film capacitors with (La,Sr)CoO3 electrodes
Publication Type
Journal Article
Authors
Aggarwal, S, A.M Dhote, Ramamoorthy Ramesh, W.L Warren, G.E Pike, D Dimos, M.V Raymond, B.A Tuttle, J .T Jr
DOI
Abstract
We report on the thermally activated hysteresis relaxation effects in (La,Sr)CoO3/ (Pb,La)(Zr,Ti)O3/(La,Sr)CoO3 thin film ferroelectric capacitors. Films cooled in oxygen deficient ambients exhibit a marked voltage offset in the hysteresis loops. Upon the application of a dc bias voltage or unidirectional pulses of the same polarity as the offset, the loops become more symmetric. Subsequently, holding the capacitors in the original preferred polarization state leads to a relaxation of the hysteresis loop towards its original voltage offset condition. The relaxation process is described by a stretched exponential and is thermally activated. © 1996 American Institute of Physics.
Journal
Applied Physics Letters
Volume
69
Year of Publication
1996
ISSN
00036951
Notes
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