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为了获得一种钙钛矿结构镧锶锰氧La0.8Sr0.2MnO3薄膜材料的复数光学常数,利用光学薄膜原理和数学优化方法,并基于钙钛矿结构材料的色散模型,对磁控溅射技术制备的不同厚度的镧锶锰氧薄膜在波数400~1250 cm-1范围内的反射光谱进行了全谱拟合,并由拟合参数确定了薄膜的复数光学常数。拟合结果显示,测试光谱和拟合光谱较为一致,说明钙钛矿结构材料的色散模型适用于描述La.08Sr0.2MnO3薄膜的光学特性,利用该色散模型并通过光谱拟合法获得La.08Sr0.2MnO3薄膜的复数光学常数是获得此材料光学特性的一种有效的方法。
In order to obtain the complex optical constants of lanthanum strontium manganese oxide oxygen La0.8Sr0.2MnO3 thin film, the optical thin film theory and mathematical optimization method were used. Based on the dispersion model of perovskite structure material, the magnetron sputtering technique The spectra of lanthanum strontium manganese oxide films with different thicknesses were fitted to full spectrum spectra in the wave number range of 400 ~ 1250 cm-1, and the complex optical constants of the films were determined by the fitting parameters. The fitting results show that the test spectra and the fitting spectra are consistent, indicating that the dispersion model of perovskite structure materials is suitable for describing the optical properties of La.08Sr0.2MnO3 thin films. La.08Sr0 can be obtained by spectral fitting using this dispersion model. The complex optical constants of 2MnO3 thin films are an effective way to obtain the optical properties of this material.