TITLE

Top-interface-controlled fatigue of epitaxial Pb(Zr[sub 0.52]Ti[sub 0.48])O[sub 3] ferroelectric thin films on La[sub 0.7]Sr[sub 0.3]MnO[sub 3] electrodes

AUTHOR(S)
Wu, Wenbin; Wenbin Wu; Wong, K. H.; Wong, K.H.; Choy, C. L.; Choy, C.L.; Zhang, Y. H.; Zhang, Y.H.
PUB. DATE
November 2000
SOURCE
Applied Physics Letters;11/20/2000, Vol. 77 Issue 21
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Epitaxial Pb(Zr[sub 0.52]Ti[sub 0.48])O[sub 3]/La[sub 0.7]Sr[sub 0.3]MnO[sub 3](PZT/LSMO) and LSMO/PZT/LSMO heterostructures have been grown on LaAlO[sub 3](001) substrates by pulsed-laser deposition. Three types of ferroelectric capacitors, i.e., Pt/PZT/LSMO (A), LSMO/PZT/LSMO (B), and Pt/PZT/LSMO (C) have been fabricated, where the Pt electrode was sputter deposited onto as-grown (capacitor A) and in situ annealed (capacitor C) PZT/LSMO films, respectively. It is found that the LSMO/PZT/LSMO capacitor shows a low coercive field and good fatigue endurance up to 10[sup 10] switching cycles. Similar properties are also obtained for capacitor A. However, the capacitor C, with the PZT film in situ annealed at reduced oxygen pressures, exhibits higher switching voltages and starts to fatigue rapidly at about 10[sup 6] bipolar switching cycles. Lead deficiency at the surface of the annealed PZT films has been observed. Our results demonstrate that the fatigue performance of PZT/LSMO films, although affected greatly by the electrode configurations, is intrinsically determined by the interface property at the top electrode. © 2000 American Institute of Physics.
ACCESSION #
4414426

 

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