Electric and magnetic properties of La0.67Sr0.33MnO3 thin films with a metal-insulator crossover behavior
Electric and magnetic properties of La0.67Sr0.33MnO3 thin films with a metal-insulator crossover behavior
复制标题
具有金属-绝缘体交叉行为的 La0.67Sr0.33MnO3 薄膜的电学和磁学特性
DOI:
10.1063/1.4737783
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发表时间:
2012-07
影响因子:
3.2
通讯作者:
W.B. Wu
中科院分区:
文献类型:
--
作者:
Y. H. Sun, Y. G. Zhao, M. H. Zhu,;W.B. Wu
The electric and magnetic properties of 10 nm thick La0.67Sr0.33MnO3 films grown on LaAlO3 substrates have been investigated. Structural analysis shows the high quality of the films. With decreasing temperature, the resistivity of the samples increases and shows a peak at about 90 K, followed by a resistivity minimum at about 30 K, manifesting a metal-insulator crossover behavior, which is quite different from the transport behaviors of thicker or thinner films. Both electric current and magnetic field can distinctly reduce the resistivity. Remarkable electroresistance under very low currents, strong resistive hysteresis, and exchange bias effect are observed at low temperatures. The results are discussed in terms of phase separation induced by compressive strain in the films.
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