Article
Phase transition and polar cluster behavior above Curie temperature in ferroelectric BaTi0.8Zr0.2O3
Author/s | Aktas, Oktay
Romero Landa, Francisco Javier He, Zhengwang Linyu, Gan Ding, Xiangdong Martín Olalla, José María Gallardo Cruz, María del Carmen Lookman, Turab |
Department | Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Publication Date | 2024-05 |
Deposit Date | 2024-05-06 |
Published in |
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Abstract | We study the phase transition behavior of the ferroelectric BaTi0.8Zr0.2O3 in the paraelectric region. The temperature dependencies of thermal, polar, elastic and dielectric properties indicate the presence of local ... We study the phase transition behavior of the ferroelectric BaTi0.8Zr0.2O3 in the paraelectric region. The temperature dependencies of thermal, polar, elastic and dielectric properties indicate the presence of local structures above the paraelectric-ferroelectric transition temperature Tc = 292 K. The non-zero remnant polarization is measured up to a characteristic temperature T* ~350 K, which coincides with the temperature where the dielectric constant deviates from Curie-Weiss law. Resonant Piezoelectric Spectroscopy shows that DC field-cooling above Tc using fields smaller than the coercive field leads to an elastic response and remnant piezoelectricity below T*, which likely corresponds to the coherence temperature associated with polar nanostructures in ferroelectrics. The observed remnant effect is attributed to the reorientation of polar nanostructures above Tc. |
Funding agencies | Natural National Science Foundation of China (NSFC) |
Project ID. | 51850410520
51931004 |
Citation | Aktas, O., Romero Landa, F.J., He, Z., Linyu, G., Ding, X., Martín Olalla, J.M.,...,Lookman, T. (2024). Phase transition and polar cluster behavior above Curie temperature in ferroelectric BaTi0.8Zr0.2O3. Applied Physics Letters, 124 (19), 192901. https://doi.org/10.1063/5.0195017. |
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