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Growth, Characterization and Electrical Properties of PZT thin Film Heterostructures on Silicon by Pulsed Laser Deposition

  • Soma Chattopadhyay (a1), Alex Kvit (a2), V. Sreenivasank (a1), A.K. Sharma (a2), C. B. Lee (a3) and J. Narayan (a1)...


Epitaxial thin films of PbZr0.52Ti0.48O3 (PZT) have been synthesized successfully on SrRuO3/SrTiO3/MgO/TiN/Si heterostructures by pulsed laser deposition. The films were single phase and had (001) orientation. The deposition parameters were varied to obtain the best epitaxial layer for each of the compounds. Transmission electron microscopy indicated good epitaxy for the entire heterostructure and sharp interfaces between the epilayers. Dielectric and P-E hysteresis loop measurements were carried out with evaporated Ag electrodes. The dielectric constant for the films was found to be between 400-450. The value of saturation polarization Ps, was between 55-60 νC/cm2 and the coercive field Ec varied from 60-70 kV/cm. Integration of PZT films with silicon will be useful for future memory and micromechanical devices.



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