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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) films with different doping amount and different tilt angles were prepared on LaAlO3 single crystal substrate by pulsed laser deposition. The measurement of laser induced voltage (LITV) signal shows that the peak value of LITV signal of La0.7 (Sr0.5Ca0.5) 0.3MnO3 thin film with x = 0.50 changes most obviously with laser energy For the films with different tilt angles, the larger the tilt angle α of the substrate, the larger the peak value of LITV signal generated on the film. When the tilt angle is 20 °, the La0.7 (Sr0.5Ca0.5) 0.3MnO3 thin film Laser induced voltage maximum. This conclusion provides a scientific basis for its application in LITV effect.