红外与毫米波学报2012，Vol.31Issue(4)：289-293,5.DOI:10.3724/SP.J.1010.2012.00289
弛豫铁电0.74Pb( Mg1/3Nb2/3)O3- 0.26PbTiO3薄膜的微结构和光学性能
Microstructures and optical properties of relaxor ferroelectric 0.74Pb ( Mg1/3 Nb2/3 ) O3 -0.26PbTiO3 thin films
摘要
Abstract
Relaxor ferroelectric 0.74Pb (Mg1/3 Nb2/3 ) O3-0.26PbTiO3 thin films were prepared on LaNiO3-buffered silicon substrates by radio-frequency magnetron sputtering.The effect of deposition temperature on films' microstructures and optical properties was investigated.The sample deposited at 500 ℃ exhibits not only a pure perovskite phase,highly ( 110 )-preferred orientation,and dense and crack-free morphology,but also the largest average remnant polarization of 17.2 μC/cm2 among all investigated films.With Cauchy model the refractive indices and extinction coefficients for these specimens have been obtained by fitting experimental reflectance spectra.At a wavelength of 633 nm,the value of refractive index 2.41 was obtained for the thin films deposited at 500 ℃.In addition,optical band gaps of the films are in the range of 2.97-3.22 eV.A preliminary discussion has been carried out on the difference in the optical properties of these films.关键词
PMN-0.26PT铁电薄膜/折射率/消光系数Key words
PMN-0.26PT ferroelectric thin films/ refractive indices/ extinction coefficients分类
数理科学引用本文复制引用
田玥,孙大志,石旺舟,胡古今,孔伟金,唐艳学,周丹,胡志娟,王飞飞,陈心满,刘锋,王涛,谢东珠..弛豫铁电0.74Pb( Mg1/3Nb2/3)O3- 0.26PbTiO3薄膜的微结构和光学性能[J].红外与毫米波学报,2012,31(4):289-293,5.基金项目
Supported by National Natural Science Foundation of China (60807036,10774154,11074265,10804060),the " Chenguang" Program of Shanghai Educational Development Foundation of China (2007CG57),the Science and Technology Commission of Shanghai Municipality (10ZR1422300),and Shanghai Municipal Education Commission (11YZ83). （60807036,10774154,11074265,10804060）
