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采用柠檬酸盐法制备了斜方六面体型(rhombohedral)钙钛矿材料La0.8Sr0.2CoO3,测量了它的拉曼光谱,我们发现随着测量用激光的激发功率的增加,705cm-1附近的拉曼振动峰不断移动,且拉曼峰的强度也不随激发功率的增加而线性增加,当激发功率达到1.5mW时,材料出现荧光,随激发光增强,荧光快速增大,同时拉曼峰消失.

参考文献

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