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铁电薄膜SrBi2Ta0.6Nb1.4O9的光疲劳特性研究

Keywords: 铁电光疲劳薄膜

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Abstract:

用PLD方法在铂金硅衬底制作了高质量的SrBi2Ta0.6Nb1.4O9(SBTN)铁电薄膜样品.研究了SBTN薄膜的电学和光学疲劳特性,分析了其机制.结果显示SBTN铁电薄膜,在电场疲劳下,具有无疲劳特性的优良电学性质;然而,在0.9V电场下,用200W汞灯疲劳样品,发现光诱导极化疲劳明显,与疲劳前相比,剩余极化下降了51%.这种光诱导剩余极化减小的疲劳,主要机理是光生载流子电畴钉扎.

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