稀土锰氧化物La_(0.7)(Sr_(1-x)Ca_x)_(0.3)MnO_3薄膜的LITV研究  

Investigation of LITV Signal of Perovskite Manganite La_(0.7)(Sr_(1-x)Ca_x)_(0.3)MnO_3 Thin Film

作　　者：杨永安[1] 张辉[2] 孙坤[1] 刘瑞明[1] 刘翔[2] 李娜[2] 张鹏翔[2] 

机构地区：[1]楚雄师范学院,云南楚雄675000 [2]昆明理工大学,云南昆明650051

出　　处：《稀有金属材料与工程》2011年第S2期41-44,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(50974066);云南省教育厅科研基金项目(07Y41846)

摘　　要：采用脉冲激光沉积法在LaAlO3单晶衬底上制备了不同掺杂量和不同倾斜角度的一系列La0.7(Sr1-xCax)0.3MnO3(LSCMO)薄膜。通过对其激光感生电压(LITV)信号测量研究表明:对不同掺杂量的薄膜,x=0.50时的La0.7(Sr0.5Ca0.5)0.3MnO3薄膜LITV信号峰值随激光能量变化最明显;对不同倾斜角度衬底的薄膜,衬底倾角α越大,在其薄膜上所产生的LITV信号峰值也越大,倾角为20o时,La0.7(Sr0.5Ca0.5)0.3MnO3薄膜的激光感生电压最大。该结论为其在LITV效应方面的应用提供科学的依据。A series of La0.7(Sr1-xCax)0.3MnO3(LSCMO) thin films was deposited by the pulse laser deposition method on tilted LaAlO3 substrates. Then the laser induced thermoelectric voltages (LITV) of these LSCMO films were measured. It is found that the LITV signal of x=0.50 film is larger than that of others for the different doping levels LSCMO films, and the LITV signal of α=20° film is the largest for different tilt-angles (α) LSCMO films. These results are very useful for the application of LSCMO thin films.

关 键 词：脉冲激光沉积 LaAlO3单晶衬底 La0.7(Sr1-xCax)0.3MnO3薄膜 LITV信号 

分 类 号：TB43[一般工业技术]