摘要
Thin films of Nd3+/V5+-cosubstituted bismuth titanate, (Bi3.5Nd0.5)( Ti2.96V0.04)O12 (BNTV), were fabricated on the Pt(111)/Ti/SiO2/Si(100) substrates by a chemical solution deposition technique and annealed at different temperatures of 650, 700, 750 and 800 ℃. The surface morphology and ferroelectric properties of the samples were studied in detail. The result shows that the film annealed at 800 ℃ indicates excellent ferroelectricity with a remanent polarization of 2Pr=40.9 μC/cm2, a coercive field (EC) of 114 kV/cm at an applied electrical field of 375 kV/cm. The substitution of Ti-site ion by V5+ ions could improve the upper limit of the optimal annealing temperature by decreasing the space charge density in BNT thin film. Additionally, the mechanism concerning the dependence of ferroelectric properties of BNTV thin films on the annealing temperature was discussed.
Thin films of Nd^3+/V^5+-cosubstituted bismuth titanate, (Bi3.sNd0.5)( Ti2.96V0.04)O12 (BNTV), were fabricated on the Pt(111)/Ti/SiO2/Si(100) substrates by a chemical solution deposition technique and annealed at different temperatures of 650, 700, 750 and 800 ℃. The surface morphology and ferroelectric properties of the samples were studied in detail. The result shows that the film annealed at 800 ℃ indicates excellent ferroelectricity with a remanent polarization of 2Pr=40.9 i.tC/cm^2, a coercive field (Ec) of 114 kV/cm at an applied electrical field of 375 kV/cm. The substitution of Ti-site ion by V^5+ ions could improve the upper limit of the optimal annealing temperature by decreasing the space charge density in BNT thin film. Additionally, the mechanism concerning the dependence of ferroelectric properties of BNTV thin films on the annealing temperature was discussed.
出处
《中国有色金属学会会刊:英文版》
CSCD
2006年第B01期71-74,共4页
Transactions of Nonferrous Metals Society of China
基金
Project (05FJ2005) supported by the Key Project of Scientific and Technological Department of Hunan Province, China
Project(05C095) supported by the Research Funds of Educational Department of Hunan Province of China
关键词
薄膜
退火温度
铁电性质
扫描电子显微镜
结晶
钛酸铋
ferroelectric properties
annealing
scanning electron microscopy
crystallization