Ferroelectric switching behavior of pulsed laser deposited Ba0.8Sr0.2TiO3 thin films
| Autor: | S. A. S. Rodrigues, Mário Pereira, A. Khodorov, Javier Martín-Sánchez, Koppole C. Sekhar, José Silva, M. J. M. Gomes |
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| Rok vydání: | 2012 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Nucleation General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology Polarization (waves) 01 natural sciences Ferroelectricity Grain size Switching time Pulse-amplitude modulation Electric field 0103 physical sciences General Materials Science Thin film 0210 nano-technology |
| Zdroj: | Current Applied Physics. 12:1144-1147 |
| ISSN: | 1567-1739 |
| DOI: | 10.1016/j.cap.2012.02.036 |
| Popis: | The effect of pulse amplitude on the ferroelectric and switching properties of pulsed laser deposited Ba0.8Sr0.2TiO3 thin films has been studied. The structural and morphological analysis revealed that the films had a well crystallized perovskite phase and grain size of about 30–40 nm. A well saturated P–E hysteresis loop was observed with a remnant polarization (Pr) ≈ 4.8 μC/cm2 and a coercive field ≈ 100 kV/cm at a frequency of 1 kHz. The Pr has been found to be decreased only 4.3% after passing 8.0 × 108 cycles. The analysis of switching response with nucleation limited switching model reveals that characteristic switching time (t0) variance is due to the random distribution of the local electric fields. The peak value of polarization current and t0 exhibits exponential dependence on reciprocal of pulse amplitude. |
| Databáze: | OpenAIRE |
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