Crossover from negative to positive magnetoresistance in Sr2CrWO6/Sr2Fe10/9Mo8/9O6 superlattices

Sr2CrWO6/Sr2Fe10/9Mo8/9O6 (SCWO/SFMO) superlattices with 4, 6, 7, 10 periods (abbreviated as S-1, S-2, S-3, and S-4) were prepared on (0 0 1) SrTiO3 (STO) substrates by pulsed laser deposition. All superlattices show macroscopic ferromagnetic behavior, and the magnetization increases with increasing...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2019-06, Vol.31 (22), p.225001-225001
Main Authors: Zhang, Ji, Ji, Wei-Jing, Xu, Jie, Gu, Zheng-Bin, Chen, Y B, Zhang, Shan-Tao
Format: Article
Language:English
Subjects:
double perovskite
magnetoresistance
superlattices
Online Access:Get full text
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Summary:Sr2CrWO6/Sr2Fe10/9Mo8/9O6 (SCWO/SFMO) superlattices with 4, 6, 7, 10 periods (abbreviated as S-1, S-2, S-3, and S-4) were prepared on (0 0 1) SrTiO3 (STO) substrates by pulsed laser deposition. All superlattices show macroscopic ferromagnetic behavior, and the magnetization increases with increasing period. The S-1 superlattice demonstrates semiconductor-like temperature-dependent resistivity in the whole measuring temperature range and negative magnetoresistance of  −5.3% at 2 K with 2 T magnetic field, while the other superlattices illustrate metallic behaviors and increasing positive magnetoresistance of 223.1%, 275.4%, and 766.1% under the same conditions. This work not only provides a feasible way to tune the MR effect in magnetic perovskite oxides, but also may stimulate further work on artificially micro-structured thin films with designable magnetic properties.
ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/ab0bf3