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Influence of Laser Irradiation and Ambient Gas in Preparation of PZT Films by Laser Ablation

  • Akiharu Morimoto (a1), Shigeru Otsubo (a2), Tatsuo Shimizu (a1), Toshiharu Minamikawa (a3), Yasuto Yonezawa (a3), Hideo Kidoh (a4) and Toshio Ogawa (a4)...

Abstract

Pb(Zr0.52Ti0. 48)O3 (PZT) films were prepared on r-plane sapphire substrates by the laser ablation method utilizing ArF excimer laser in O2 or N2O environment. The composition of the films deposited in O2 environment was found to be fairly close to the composition of the target material for a wide range of substrate temperatures, 400 – 750 °c. Increasing the laser fluence (the laser power density) for the ablation enhances the formation of the perovskite structure rather than the pyrochlore one. Use of N2O ambient gas instead of O2 gas enhances the formation of the perovskite structure of PZT films. Furthermore, it was found that a laser irradiation on the growing film surface during deposition enhances the formation of the perovskite structure.

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