Interface‐related degradation problems in
PbZrxTi1−xO3
(PZT) thin‐ film nonvolatile memories have led to the search for alternate electrode materials to replace the conventional metal electrodes. In this work, the suitability of ceramic electronic conductors [e.g., ruthenium oxide
false(RuO2false)
and indium‐tin‐oxide (ITO)] as contact metallization for ferroelectric
PbZrxTi1−xO3
thin films has been investigated using techniques such as Rutherford backscattering spectrometry, x‐ray diffraction, and electron spectroscopy for chemical analysis. Thin films of
RuO2
and ITO were deposited onto Si substrates by reactive sputtering. Sol‐gel derived PZT thin films then were deposited onto the conducting oxides and the samples were annealed at various temperatures between 400 and 700°C. Less intermixing was observed in
normalSi/RuO2/PZT
films when compared to Si/ITO/PZT under similar processing conditions. The ferroelectric properties of PZT films (hysteresis, fatigue, and low voltage breakdown) on
RuO2
electrodes were compared to those on Pt electrodes. PZT films show improved fatigue properties on
RuO2
electrodes. The films on
RuO2
electrodes also showed better current‐voltage characteristics (I–V) and time‐dependent dielectric breakdown properties (TDDB).
Structural and optical properties of laser deposited ferroelectric (Sr0.2Ba0.8)TiO3 thin films J. Appl. Phys. 79, 7965 (1996); 10.1063/1.362346Electrical properties of SrBi2Ta2O9 thin films and their temperature dependence for ferroelectric nonvolatile memory applications Appl. Phys. Lett. 68, 2300 (1996); 10.1063/1.116170Effects of deposition rate on Bi2Sr2CaCu2O8+x and Bi2Sr1.6La0.4CuO6+x epitaxial thinfilm growth by pulsed laser ablation AIP Conf.
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