用固相反应法制各La0.7Ba0.3Mn0.95X0.05O3(X=Mn,Cr,Fe,Co)系列块材,并利用磁控溅射法在LaAlO3单晶衬底上制备薄膜,研究过渡金属元素(Cr,Fe和Co)锰位掺杂对La0.7Ba0.3MnO3(LBMo)薄膜光诱导特性的影响.研究表明,Cr,Fe和Co掺杂均导致薄膜的金属-绝缘转变温度(Tp)降低,电阻率和光致电阻率相对变化的最大值(LRmax)增大.其中Fe离子对体系影响最大,Co离子次之,Cr离子影响最小.激光诱导在不同温区对薄膜电阻率的影响不同,在低温(T
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