Enhanced ferro- and piezoelectric properties in (100)-textured Nb-doped Pb(ZrxTi1 − x)O3 films with compositions at morphotropic phase boundary |
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| Authors: | C Ruangchalermwong Jing-Feng Li Zhi-Xiang Zhu S Muensit |
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| Affiliation: | a State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China
b Department of Physics, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand |
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| Abstract: | To develop high-performance piezoelectric films on conventional Pt(111)/Ti/SiO2/Si(100) substrates, sol-gel-derived highly 100]-textured Nb-doped Pb(ZrxTi1 − x)O3 (PNZT) thin films with different Zr/Ti ratios ranging from 20/80 to 80/20 were prepared and characterized. The phase structure, ferroelectric and piezoelectric properties of the PZNT films were investigated as a function of Zr/Ti ratios, and it was confirmed that there was distinct phase transition of the PNZT system from tetragonal to rhombohedral when the Zr/Ti ratio varied across the morphotropic phase boundary (MPB). The Nb-doped PZT films showed enhanced remanent polarization but reduced coercive field, whose best values reached 75 μC/cm2 and 82 kV/cm, respectively at the composition close to MPB. In addition, the 100]-textured PNZT film at MPB also shows a high piezoelectric coefficient up to 161 pm/V. All these properties are superior to those for undoped PZT films. |
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| Keywords: | Lead zirconate titanate Niobium doping Film orientation Ferroelectric properties Piezoelectric properties Auger electron spectroscopy X-ray Composition |
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