Abstract

(Bi,Nd) 4Ti 3O 12 (BNT) ferroelectric films were deposited on Pt/Ti/SiO 2/Si substrates by chemical solution deposition and the effect of crystallization temperature on their microstructure and ferroelectric properties were studied systematically. The crystallinity of the BNT films was improved and the average grain size increased as the crystallization temperature increased from 650 to 750 °C at an interval of 20 °C. However, the polarization and dielectric constant of the films are not a monotonous function of the crystallization temperature. The BNT films crystallized at 710 °C has the largest remanent polarization value of 2 P r = 60.8 μC/cm 2, and a fatigue-free characteristic. A positive correlation between the remnant polarization and dielectric constant of the BNT films has been observed.

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