Switching kinetics of lead zirconate titanate submicron thin‐film memories
作者:
J. F. Scott,
L. Kammerdiner,
M. Parris,
S. Traynor,
V. Ottenbacher,
A. Shawabkeh,
W. F. Oliver,
期刊:
Journal of Applied Physics
(AIP Available online 1988)
卷期:
Volume 64,
issue 2
页码: 787-792
ISSN:0021-8979
年代: 1988
DOI:10.1063/1.341925
出版商: AIP
数据来源: AIP
摘要:
We have measured coercive field and switching voltage versus thickness in PbZr0.54Ti0.46O3thin (0.15–0.50 &mgr;m) films, together with switching times and current transient shapes versus field and temperature. The results show activation fields of order 120 kV/cm at room temperature, threshold voltages below 1.3 V, and switching speeds faster than 100 ns, demonstrating that fast, nonvolatile memories can be constructed that are compatible with standard silicon or GaAs integrated circuit voltage levels, without the need for an internal voltage pump. The displacement current transient data yield 2.5 as the dimensionality of domain growth if one‐step intial nucleation rate is assumed, and are compatible with the theory of Ishibashi, yieldingimaxtmax/Ps=1.65±0.23, in comparison with the predicted 1.646. The switching time exhibits an activation field dependence upon both voltage and temperature through a single reduced parameter (TC−T)(VTC),−1in accord with the theory of Orihara and Ishibashi.
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