Preparation and ferroelectric properties of Bi_(3.4)Ce_(0.6)Ti_3O_(12) thin films grown by sol-gel method  

作　　者：GUO DongYun1, LI MeiYa1, LIU Jun1, YU BenFang1, PEI Ling1, WANG YunBo2, YU Jun2 & YANG Bin2 1 Department of Physics, Wuhan University, Wuhan 430072, China 2 Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China 

出　　处：《Science China(Technological Sciences)》2008年第1期10-15,共6页中国科学（技术科学英文版）

基　　金：the Natural Science Foundation of Hubei Province (Grants No. 2004ABA082)

摘　　要：We have investigated the preparation and properties of Bi3.4Ce0.6Ti3O12 thin films. The Bi3.4Ce0.6Ti3O12 thin films were fabricated on the Pt/Ti/SiO2/Si substrates using sol-gel method. The structure and morphology of the films were characterized us- ing X-ray diffraction and atomic force microscopy. The thin films showed a perovskite phase and dense microstructure. The dielectric constant and the dissi- pation factor of the Bi3.4Ce0.6Ti3O12 thin films were about 172 and 0.031 at 1 kHz, respectively. The 2Pr and 2Ec of the Bi3.4Ce0.6Ti3O12 thin films were 67.1 μC/cm2 and 299.7 kV/cm, respectively, under an applied field of 600 kV/cm. The Bi3.4Ce0.6Ti3O12 film did not show fatigue up to 4.46×109 switching cycles at a frequency of 1 MHz, and showed good insulating behavior according to the test of leakage current.We have investigated the preparation and properties of Bi3.4Ce0.6Ti3O12 thin films. The Bi3.4Ce0.6Ti3O12 thin films were fabricated on the Pt/Ti/SiO2/Si substrates using sol-gel method. The structure and morphology of the films were characterized us- ing X-ray diffraction and atomic force microscopy. The thin films showed a perovskite phase and dense microstructure. The dielectric constant and the dissi- pation factor of the Bi3.4Ce0.6Ti3O12 thin films were about 172 and 0.031 at 1 kHz, respectively. The 2Pr and 2Ec of the Bi3.4Ce0.6Ti3O12 thin films were 67.1 μC/cm2 and 299.7 kV/cm, respectively, under an applied field of 600 kV/cm. The Bi3.4Ce0.6Ti3O12 film did not show fatigue up to 4.46×109 switching cycles at a frequency of 1 MHz, and showed good insulating behavior according to the test of leakage current.

关 键 词：Bi3.4Ce0.6Ti3O12 THIN film SOL-GEL method FERROELECTRIC property DIELECTRIC fatigue LEAKAGE current 

分 类 号：O484.1[理学—固体物理]