Remarkable Improvement of Ferroelectric Properties and Leakage Current in BiFeO_3 Thin Films by Nd Modification
Remarkable Improvement of Ferroelectric Properties and Leakage Current in BiFeO_3 Thin Films by Nd Modification作者机构:School of Materials Science and Engineering Guilin University of Electronic Technology
出 版 物:《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报(材料科学英文版))
年 卷 期:2018年第33卷第1期
页 面:64-67页
核心收录:
学科分类:07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程(可授工学、理学学位)] 0702[理学-物理学]
基 金:Funded by the Guangxi Experiment Center of Information Science China(No:YB1416)
主 题:BiFeO3 thin film ferroelectric leakage current sol-gel
摘 要:Ferroelectric and leakage properties are important for ferroelectric applications. Pure and Nd-doped(x=0.05-0.20) BiFeO3 thin films were fabricated by sol-gel method on FTO substrates. The phase structure, surface morphology, leakage current, ferroelectric properties, and optical properties of BiFeO3-based thin films were investigated. The substitution of Nd^3+ ions for the Bi^3+ site converts the structure from rhombohedral to coexisting tetragonal and orthorhombic. Nd doping improves the crystallinity of BiFeO3 thin films. The leakage current of Nd-doped BiFeO3 decreases by two to three orders of magnitude compared with that of pure BiFeO3. Among the samples, 15% Nd-doped BiFeO3 exhibits the strongest ferroelectric polarization of 17.96 μC/cm^2. Furthermore, the absorption edges of Bi1-xNdxFeO3 thin films show a slight red-shift after Nd doping.