(Bi,Pb)_2Sr_2CaCu_2O_8薄膜的激光感生电压效应  

Laser Induced Voltage Effect of (Bi,Pb)_2Sr_2CaCu_2O_8 Thin Films

作　　者：张辉[1] 何恩全[1] 杨宁[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《中国激光》2012年第10期125-129,共5页Chinese Journal of Lasers

基　　金：昆明理工大学校重点基金项目(KKZ1200927002)资助课题

摘　　要：采用紫外脉冲激光沉积技术和高低温沉积工艺,在LaAlO3(100)平衬底及倾斜衬底上成功制备了c轴取向的(Bi,Pb)2Sr2CaCu2O8[(Bi,Pb)-2212]薄膜;研究了在倾斜LaAlO3(100)单晶衬底上生长的(Bi,Pb)-2212薄膜激光感生热电电压信号与沉积条件及入射激光能量的关系。为避免(Bi,Pb)-2212薄膜被激光剥蚀或蒸发,还初步研究了MgO保护层对(Bi,Pb)-2212薄膜激光感生电压信号的作用,结果表明MgO层能够显著增强激光感生热电电压效应。Pulsed laser deposition technique is employed to grow c axis oriented（Bi,Pb）2Sr2CaCu2O8[（Bi,Pb）-2212]/LaAlO3（100） thin films under both the low and high temperature deposition process.The laser induced thermoelectric voltage（LITV） effect is studied on the films grown on vicinal-cut LaAlO3（100） substrates;the influences of deposition time and incident laser energy on LITV signals are investigated.Moreover,in order to prevent laser-ablating or laser-evaperating of the films,（Bi,Pb）-2212 film coated with MgO layer is prepared,and the effect of MgO protecting layer on LITV signals of the films is studied.The result shows that LITV effect can be dramatically enhanced by MgO protection layer.

关 键 词：薄膜 脉冲激光沉积 (Bi Pb)2Sr2CaCu2O8 激光感生热电电压 

分 类 号：O484[理学—固体物理]