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采用高度稀释的前驱体溶液在LaNiO3 (LNO)薄膜上沉积了Ba0 .9Sr0 .1TiO3 (BST)薄膜 .X 射线衍射分析表明BST薄膜呈高度的 (10 0 )择优取向 .原子力显微镜测量发现制备的BST薄膜具有大的晶粒尺寸 80～ 2 0 0nm .用椭偏光谱仪测量了光子能量为 0 .7～ 3.4eV范围内BST薄膜的椭偏光谱 ,用Cauchy模型描述BST薄膜的光学性质 ,获得了BST薄膜的光学常数谱和禁带宽度Eg=3.36eV .
Ba0.9Sr0.1TiO3 (BST) thin films were deposited on LaNiO3 (LNO) thin films by using highly diluted precursor solution. X-ray diffraction analysis showed that the BST thin films were highly (10 0) preferred orientation. The results of atomic force microscopy showed that the prepared BST The film has a large grain size of 80 ~ 200nm.The ellipsometric spectra of BST films with photon energy of 0.7-7.4eV were measured by ellipsometry, the optical properties of BST films were described by Cauchy model, and the BST The optical constant spectrum of the film and the forbidden band width Eg = 3.36eV.