摘要
An oxygen-deficient SrTiO3/La0.67Sr 0.33MnO3 heterojunction is fabricated on an SrTiO 3 (001) substrate by a pulsed laser deposition method. The electrical characteristics of the heterojunction are studied systematically in a temperature range from 80 K to 300 K. The transport mechanism follows I ∝ exp(eV/nkT) under small forward bias, while it becomes space charge limited and follows I ∝ Vm(T) with 1.49 < m < 1.99 under high bias. Such a heterojunction also exhibits magnetoresistance (MR) effect. The absolute value of negative MR monotonically increases with temperature decreasing and reaches 26.7% at 80 K under H = 0.7 T. Various factors, such as strain and oxygen deficiency play dominant roles in the characteristics.
源语言 | 英语 |
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文章编号 | 127302 |
期刊 | Chinese Physics B |
卷 | 22 |
期 | 12 |
DOI | |
出版状态 | 已出版 - 12月 2013 |