用溶胶-凝胶法在Pt/Ti/SiO2/Si(100)基底上制备Pb1-xLaxTiO3(PLT,x≤0.2)薄膜,研究薄膜的结构及其介电、铁电性能.在600℃下退火1h的PLT薄膜表现出单一的钙钛矿结构,(100)择优取向明显.在室温下PLT薄膜有典型的电滞回线.在x≤0.2(摩尔比)的范围内,PLT薄膜的矫顽场、剩余极化强度都随着La的增加而降低,相对介电常数则随着La的增加而增加.
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