Optical and dielectric properties of CaBi4Ti4O15 films prepared from sol gel route

摘要：

Calcium Bismuth Titanate (CBT) is the potential material for the high temperature piezoelectric and ferroelectric applications, and exhibits excellent property for the non-volatile FeRAM for various commercial applications. In the present study CBT thin films were prepared from sol gel technique using acetate precursor method and films were annealed over a wide temperature range (500oC–800oC). The crystallographic orientations of films were investigated using X-ray diffraction and confirmed the orthorhombic structure. Grain size of the prepared CBT film increases from 19nm to 94nm with the increase in annealing temperature from 500oC to 800oC. The transmittance of the films in the visible region decrease with the increase in annealing temperature. Raman spectroscopy study indicates the formation of single phase layered perovskite material at 700oC. Optical band gap of the CBT film annealed at 700oC was found to be minimum (3.4 eV). The dielectric constant measured at room temperature approach the bulk value for the CBT films annealed at 700oC temperature.

作者: Amit Tanwar K. Sreenivas Vinay Gupta

作者单位: Department of Physics and Astrophysics,University of Delhi,Delhi-110007,India

会议类型: 国际会议

会议名称: 2009 The 18th IEEE International Symposium on Applications of Ferroelectrics(2009年国际铁电学暨IEEE国际铁电应用联合会议)

会议地点: 西安

会议语种:英文

页码: 164-168

在线出版日期: 2009-08-23（万方平台首次上网日期，不代表论文的发表时间）