Influence of Excess Potassium on Structural and Ferroelectric Properties of Lead-Free Bi 0.5 K 0.5 TiO₃ Thin Films.

Autor: Minh NN; Electrical and Electronic Faculty, Hung Yen University of Technology and Education, Hung Yen Province 160000, Vietnam., Dan BV; Electrical and Electronic Faculty, Hung Yen University of Technology and Education, Hung Yen Province 160000, Vietnam., Minh ND; International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology, Hanoi 100000, Vietnam., Rijnders G; MESA+Institute for Nanotechnology, University of Twente, 7500, AE, Enschede, The Netherlands., Quan ND; School of Engineering Physics, Hanoi University of Science and Technology, Hanoi 100000, Vietnam.
Jazyk: angličtina
Zdroj: Journal of nanoscience and nanotechnology [J Nanosci Nanotechnol] 2021 Apr 01; Vol. 21 (4), pp. 2681-2686.
DOI: 10.1166/jnn.2021.19117
Abstrakt: Lead-free Bi 0.5 K 0.5 TiO₃ (BKT) ferroelectric films were synthesized on Pt/Ti/SiO₂/Si substrates via the chemical solution deposition. The influence of the excess potassium on the microstructures and the ferroelectric properties of the films was investigated in detail. The results showed that the BKT films have reached the well-crystallized state in the single-phase perovskite structure with 20 mol.% excess amount of potassium. For this film, the ferroelectric properties of the films were significantly enhanced. The remnant polarization ( P r ) and maximum polarization ( P m ) reached the highest values of 9.4 μ C/cm₂ and 32.2 μ C/cm₂, respectively, under the electric field of 400 kV/cm.
Databáze: MEDLINE
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