论文部分内容阅读
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.
SrTiO3 and SrNb0.2Ti0.8O3 thin films were prepared by pulsed laser deposition.The X-ray diffraction analysis showed that SrTiO3 and SrNb0.2Ti0.8O3 thin films grown on LaAlO3 (100) single-crystal flat substrates are near [001] oriented Epitaxial growth.With the oxygen pressure in a certain range gradually increased, the lattice parameter of SrTiO3 thin film decreases, while the lattice parameter of SrNb0.2Ti0.8O3 first decreases and then increases.At the same time to explore the preparation of two-dimensional electron The optimal oxygen pressure of the gas superlattice (SrTiO3 / SrNb0.2Ti0.8O3) L is 1.0 × 10-2 Pa. Laser induced laser is also observed in the SrNb0.2Ti0.8O3 thin film prepared on a LaAlO3 (100) inclined substrate Thermoelectric voltage effect.