Multi-field modulation of transport properties in critical state (La1-yPry)0.5Sr0.5MnO3 thin films

Hui Di Li, Xin Yu Li, Wei Li, Shuan Hu Wang, Chang Le Chen, Ke Xin Jin

科研成果: 期刊稿件文章同行评审

摘要

In this letter, we report the related transport properties of (La1-yPry)0.5Sr0.5MnO3 (y = 0.1, 0.2, 0.3, 0.4 and 0.5) films prepared by pulsed laser deposition. The transport properties of the films with different fields applied, such as optical field, magnetic field and strain field, were investigated. The results show that the resistance increases and the metal–insulator transition temperature shifts to lower temperature with the increasing of Pr doping. However, the film with the doping amount of 0.5 exhibits an insulation characteristic, and showed transient photoconductivity effect, with a relative change of photo-resistance of 7.2% at low temperature. Otherwise, a negative magneto-resistance of 54% was observed at 80 K and 1 T magnetic field. Further, by using an external electric field to modulate the films grown on the PbMg1/3Nb2/3O3-PbTiO3 substrate, it was found that the electric field reduced the resistance and had a faking effect on the relative change of the photo-resistance. It is mainly attributed to the influence of the external field on lattice distortion and charge carrier delocalization.

源语言英语
文章编号909
期刊Applied Physics A: Materials Science and Processing
128
10
DOI
出版状态已出版 - 10月 2022

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