Ba0 7Sr0.3TiO3铁电薄膜的介电温谱呈现弥散相变的特征,相对介电常数与温度呈现平方关系TEM观察表明,10nm量级微畴随机分布在晶粒中,选区电子衍射(SAED)揭示微畴区存在1/2{201}超点阵,Ba2+、Sr2+离子层在[001]方向的交替排列可以描述该超点阵.
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