利用TEM研究了脉冲激光法(PLD)制备的外延生长La0.7Ca0.3MnO3薄膜的显微结构.结果表明,在近衬底处薄膜具有单一取向,随薄膜厚度增加,出现大量的微畴结构.此外,结合电子衍射与高分辨像(HREM)观察确定了薄膜的结构不同于体材料的正交结构,而是具有单斜结构.
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