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BiFeO3薄膜中的电学输运性质

Keywords: 铁电铁磁薄膜电学输运铁酸铋薄膜

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Abstract:

报道了铁酸铋薄膜样品在80K-300K温度范围直流电学输运性质的研究结果.利用同一前驱体不同老化时间,用化学溶液沉积法在钛酸锶衬底上制备出两种样品.在低阻样品中,低场下电流随电压变化遵从欧姆定律,电阻不随温度变化;而在中等强度外场下显示出肖特基二极管性质.在高阻样品中.低场下电流密度沿晶界分布,输运中的势垒能级为0.57eV;高场下电流的传输则遵从Frenkel-Poole模型,相关势垒能级0.12eV.低阻和高阻两种样品在85K温度下可测最大剩余极化分别为2.6μ/cm^2和28.8μC/cm^2.

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