Research on Optical and Electrical Properties of BiFeO_3 /La_0.5Gd_0.17Sr_0.33CoO_3 Heterojunction AITranslate

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Chinese Library Classification Number:O472[理学—半导体物理]

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The BiFeO3/La0.5Gd0.17Sr0.33CoO3 heterojunction was prepared by pulsed laser deposition on the LaAlO3 substrate, and its optical and electrical properties were investigated. The results show that the La0.3Gd0.17Sr0.33CoO3 film,with a smooth and homogeneous surface, can provide favorable conditions for the growth of BiFeO3 film. At the temperature above 200 K,the BiFeO3/La0.5Gd0.17Sr0.33CoO3 heterojunc- tion shows semiconductor properties, and its resistance decreases with the increase of temperature. The optical band gap of the heterojunction is 3. 543 eV,so it has photo induced carriers generated by UV laser irradiation at room temperature.