Ferroelectric properties and phase transitions of high performance vertically aligned KNN nanowire-arrays grown by pulsed laser deposition
| Autor: | E. Benítez, J.J. Gervacio-Arciniega, Osmary Depablos-Rivera, Rigoberto López-Juárez, R. Castañeda-Guzmán |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Phase transition Piezoelectric coefficient Materials science Analytical chemistry 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Ferroelectricity Piezoelectricity Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Pulsed laser deposition Piezoresponse force microscopy Phase (matter) 0103 physical sciences Deposition (phase transition) 0210 nano-technology |
| Zdroj: | Physica E: Low-dimensional Systems and Nanostructures. 123:114143 |
| ISSN: | 1386-9477 |
| Popis: | Pulsed laser deposition (PLD) was used to synthesize piezoelectric nanowire-arrays of K0·5Na0·5NbO3 (KNN) on Pt/TiO2/SiO2/Si substrates. These arrays were successfully prepared by using two different deposition conditions than the previously reported for KNN. KNN with orthorhombic structure and minority secondary phases were identified by XRD. Ferroelectric and Piezoelectric properties were confirmed by piezoresponse force microscopy, and showed that nanowire-arrays have an improvement in their effective piezoelectric coefficient of d33eff = 94.6 p.m./V and 133.6 p.m./V, higher than previously reported coefficients. Pulsed laser photoacoustic technique was used to analyze the phase transition temperatures and they showed a phase transition (O-T) at ~170 °C and a phase transition (T-C) at ~360 °C, lower temperatures than those found for bulk ceramics. Furthermore, it was identified the presence of minor amount of secondary ferroelectric phase (K4Nb6O17). |
| Databáze: | OpenAIRE |
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