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化学溶液法制备PbZr0.5Ti0.5O3/La0.5Sr0.5CoO3铁电多层薄膜的结构和光学性质研究

Keywords: PbZr0.5Ti0.5O3/La0.5Sr0.5CoO3结构光学性质化学溶液法铁电多层薄膜椭偏光谱光学常数谱锆钛酸铅

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Abstract:

采用金属有机化学液相沉积法在Si衬底上制备了La0.Sr0.5CoO3(LSCO)导电金属氧化物薄膜,采用溶胶-凝胶法在LSCO导电金属氧化物薄膜上沉积了PbZr0.5Ti0.5O3(PZT)铁电薄膜,X-射线测量结果表明在700℃的退火温度下制备的PZT/LSCO铁电多层薄膜呈(110)取向的钙钛矿结构,谢乐公式估算铁电薄膜的晶粒尺寸为50-80nm,原子力显微镜观察结果显示:薄膜表面平整,均方根粗糙度(RMS)小于5nm,用拉曼光谱测量表明PZT薄膜呈拉曼活性,椭圆偏振光谱仪用来表征薄膜在400-1700nm波长范围的光学性质,用洛仑兹模型来描述PZT和LSCO薄膜的光学性质,获得PZT和LSCO薄膜的折射率,消光系数等光学常数谱。

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