Preparation and Characterization of Lead Zirconate Titanate Thin Films Derived by Hybrid Processing: Sol-Gel Method and Pulsed Laser Deposition

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Pb(Zr0.52Ti0.48)O3 (PZT) thin films were prepared on Pt/Ti/SiO2/Si substrates by hybrid processing: sol-gel method and pulsed laser deposition. The temperature of postdeposition annealing in hybrid processing is 650°C, and is lower than that in the case of direct film deposition by pulsed laser deposition on a Pt/Ti/SiO2/Si substrate. The preferred orientation of the PZT films obtained by hybrid processing can be controlled using the seeding layer obtained by the sol-gel process. The TEM image showed that the PZT films have a polycrystalline columnar microstructure extending throughout the thickness of the film and no sharp interface was observed between the layers obtained by the sol-gel method and the pulsed laser deposition process. Electrical properties of the films were evaluated by measuring their $P$-$E$ hysteresis loops and dielectric constants. The 1-μm-thick PZT films fabricated by hybrid processing consist of mainly the perovskite phase with a (111)-preferred orientation and have good ferroelectric properties. The ferroelectric parameters were remanent polarization $P_{\text{r}}=23.6$ μC/cm2, and coercive field $E_{\text{c}}=54.8$ kV/cm.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2003-09-15