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物理学报 2008
Oxygen pressure effect on lattice parameters of SrTiO3 and SrNb0.2Ti0.8O3 thin films and laser-induced thermoelectric voltages effect
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Abstract:
采用脉冲激光沉积技术制备了SrTiO3和SrNb0.2Ti0.8O3薄膜.X射线衍射分析表明在LaAlO3(100)单晶平衬底上生长的SrTiO3及SrNb0.2Ti0.8O3薄膜是沿［001］取向的近外延生长.随着氧压在一定范围内逐渐增大，SrTiO3薄膜的晶格参数减小，而SrNb0.2Ti0.8O3薄膜的晶格参数先减小后增大.同时摸索出制备具有二维电子气超晶格(SrTiO3/SrNb0.2Ti0.8O3)L的最佳氧压为1.0×10-2Pa.另外在LaAlO3(100)倾斜衬底上制备的SrNb0.2Ti0.8O3薄膜中观察到激光感生热电电压效应.
