Sr_2FeMoO_6薄膜激光感生热电势效应的研究  

Laser-induced thermoelectric voltage effect of Sr_2FeMoO_6 film

作　　者：陶汝华[1,2] 张玉亮[1,2] 董伟伟[1,2] 邓赞红[1,2] 王波[3] 方晓东[1,2] 

机构地区：[1]中国科学院安徽光学精密机械研究所,安徽合肥230031 [2]中国科学院新型薄膜太阳电池重点实验室,安徽合肥230031 [3]中国科学院固体物理研究所,安徽合肥230031

出　　处：《量子电子学报》2010年第3期351-355,共5页Chinese Journal of Quantum Electronics

基　　金：安徽省自然科学基金(090414169);中科院安徽光机所激光中心基金

摘　　要：采用脉冲激光沉积法在倾斜SrTO_3(100)衬底上制备出高质量的Sr2FeMoO_6薄膜,观察到薄膜在可见、红外波段的脉冲激光照射下具有很大的激光感生热电势效应(LITV)。研究表明,用1064 nm和532 nm波长的脉冲激光从薄膜表面垂直照射时,薄膜表面产生的最大峰值电压分别为0.9 V和0.8 V,并且LITV信号与激光能量成良好的线性关系,可用以制造高灵敏度的激光功率计/能量计。当激光从SrTO_3衬底方向照射时,LITV极性发生变化。上述现象用各项异性Seebeck效应给予了解释。Sr2FeMoO6 film was grown on vicinal-cut SrTiO3 （100） substrate by pulsed laser deposition method. The laser-induced thermoelectric voltage （LITV） was observed when the film was irradiated by visible and infrared pulsed laser. It was found that the maximal peak voltages were 0.9 V and 0.8 V when the film was irradiated by the laser of 1064 nm and 532 nm wavelength, respectively. The intensity of the LITV signals changed linearly with the pulse energy, which can be used as laser power/energy meters with high sensitivity. It was also found the signal polarity was reversed when the sample was irradiated through the substrate rather than at the air/film interface. Anisotropy Seebeck effect is proposed to cause the lateral voltages.

关 键 词：薄膜 激光感生热电势 脉冲激光沉积 Sr2FeMoO6 SEEBECK效应 

分 类 号：TN304.7[电子电信—物理电子学]