Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7887774 | Ceramics International | 2018 | 22 Pages |
Abstract
Perovskite Na0.5(Bi1âxNdx)0.5TiO3 (x = 0, 0.01, 0.03, 0.05; xNd: NBT) ferroelectric films were synthesized on indium tin oxide (ITO)/glass substrates via chemical solution deposition. Structural characterization shows the similar phase-pure perovskite structures in all the films and gradually decreased grain sizes with Nd3+ doping amount increasing. For all the films, the leakage behaviors are dominant by the Ohmic conduction in low electric field region and interface-limited Fowler-Nordheim tunneling mechanism in high electric field region. Additionally, the space-charge-limited conduction is involved in 0.03Nd: NBT sample. Compared with the sample of x = 0, the resistivity can be improved through Nd3+-substitution in NBT. Enhanced ferroelectricity can be obtained from the dynamic polarization-electric field test, and the reversible domains switching in film can be confirmed by static dielectric constant-electric field measurement. Especially, the 0.03Nd: NBT possesses optimal electrical performances with a large remanent polarization (Pr = 26.7 μC/cm2) and a high dielectric tunability (19.6% at 100 kHz).
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
C.H. Yang, Y.J. Han, X.S. Sun, J. Chen, J. Qian, L.X. Chen,