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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Chu, D. P. Zhu, H. |
| Description | Author Affiliation: Zhu H ( College of Electronic Information and Control Engineering, Beijing University of Technology, 100 Pingle Yuan, Chaoyang District, Beijing 100124, People's Republic of China.) |
| Abstract | Capacitance-voltage (C-V) characteristics of lead zirconate titanate (PZT) thin films with a thickness of 130 nm were measured between 300 and 533 K. The transition between ferroelectric and paraelectric phases was revealed to be of second order in our case, with a Curie temperature at around 450 K. A linear relationship was found between the measured capacitance and the inverse square root of the applied voltage. It was shown that such a relationship could be fitted well by a universal expression of C/A = k(V+V(0))(-1/2) and that this expression could be derived by expanding the Landau-Devonshire free energy at an effective equilibrium position of the Ti/Zr ion in a PZT unit cell. By using the derived equations in this work, the free energy parameters for an individual material can be obtained solely from the corresponding C-V data, and the temperature dependences of both remnant polarization and coercive voltage are shown to be in quantitative agreement with the experimental data. |
| ISSN | 09538984 |
| e-ISSN | 1361648X |
| Journal | Journal of Physics: Condensed Matter |
| Issue Number | 49 |
| Volume Number | 23 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2011-12-14 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Electric Capacitance Chemistry Magnetics Nanostructures Titanium Zirconium Iron Compounds Discipline Condensed Matter Physics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Materials Science |
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