研究了BiFe0.95Mn005 O3薄膜器件的双极性阻变效应.通过对薄膜器件的电流电压曲线进行电导机制的拟合分析,发现在低阻态时其电流电压关系遵循欧姆定律,而在高阻态时则满足指数分布陷阱控制的空间电荷限制电流规律.同时,还研究了限制电流对双极性阻变效应的影响,结果表明通过调节限制电流值,可以改变薄膜内形成的导电丝粗细,从而得到不同的低阻态,实现薄膜器件的多态存储功能.在导电丝理论的基础上,利用指数分布陷阱控制的空间电荷限制电流机理对这一现象进行了详尽的阐述.
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