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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

10.1063/1.117732

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

Year of Publication

1996

ISSN

00036951

Notes

cited By 50

Research Areas

Ramesh Lab