Mechanism of grain growth and excellent polarization, dielectric relaxtion of La3+, Nd3+ modified PZT nano-films prepared by sol–gel technique
| Autor: | Ze-Hui Peng, Gui-Gui Peng, Liu Yang, De-Yi Zheng, Tao Zhou, Kaixin Guo, Wan-Nan Zhao |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Doping Analytical chemistry 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Ferroelectricity Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Dielectric spectroscopy Tetragonal crystal system 0103 physical sciences Dielectric loss Electrical and Electronic Engineering Thin film 0210 nano-technology |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 29:18011-18019 |
| ISSN: | 1573-482X 0957-4522 |
| DOI: | 10.1007/s10854-018-9974-3 |
| Popis: | Ferroelectric PbZr0.52Ti0.48O3 film and its partial substitutions by rare earth ions La3+ and Nd3+ Pb0.9(La/Nd)0.1Zr0.52Ti0.48O3, grown on Pt(111)/Ti/SiO2/Si(100) substrates, were prepared via sol–gel and rapid thermal processes. Structural characterization by X-ray diffraction and scanning electron microscopy showed that Pb(Zr0.52Ti0.48)O3 and Pb0.9La0.1(Zr0.52Ti0.48)O3 films are of (111) preferred orientation but Pb0.9Nd0.1(Zr0.52Ti0.48)O3 is more inclined to (100) reflection though both are of tetragonal perovskite structure. The results indicate that the piezoelectric properties of PZT thin films can be improved by doping La3+ and Nd3+ substituted A-site. The d33 can be dramatically improved by doping La3+. Moreover, Pr of Pb(Zr0.52Ti0.48)O3 films reaches up to 120.53 µC/cm2, while the doping samples present relatively inferior ferroelectric hysteresis loops (PrLa = 64.32, PrNd = 53.17 µC/cm2), greater dielectric constants, higher dielectric loss and lower leakage current than the undoped Pb(Zr0.52Ti0.48)O3 sample. And meanwhile, the samples showed a typical non-Debye dielectric spectroscopy of multiple quantum relaxation time distribution observing from the Cole–Cole plot at room temperature. |
| Databáze: | OpenAIRE |
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