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Enhanced Magnetoresistance Effect and Magnetic Properties of Double Perovskite La2−xSrxMnRuO6 (0 ≤ x ≤ 1.0)

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Abstract

Double perovskite La2−xSrxMnRuO6 (x = 0, 0.3, 0.5, 0.8, 1.0) samples were synthesized by the standard solid-state reaction method. The compounds can be well indexed as an orthorhombic structure with the space group of Pnma at room temperature. The Sr-doped samples exhibit a stronger ferromagnetic behavior than the undoped sample, which is responsible for the ferromagnetic super-exchange interaction of Mn3+-O2−-Ru4+. The Curie temperature of all samples increases with the increasing Sr2+ concentration. All the samples show a semiconducting-like behavior, and the nature of electrical conduction can be well described by Mott’s three-dimensional variable range hopping model. The appropriate Sr2+ substitution can effectively enhance the magnetoresistance effect. An enhanced negative magnetoresistance effect (~ 49%) in the La1.5Sr0.5MnRuO6 sample was observed at 25 K and 7 T.

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Funding

This work is supported by the Natural Science Foundation of Jiangsu Province of China (Grant No. BK20201285).

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  1. Xin Ding and Zhong Chen are contributed equally to this work

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  1. School of Physics, Southeast University, Nanjing, 211189, People’s Republic of China

    Xin Ding, Zhong Chen, Mingxiang Xu & Lei Xing

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  1. Xin Ding
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  2. Zhong Chen
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Correspondence to Mingxiang Xu.

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Ding, X., Chen, Z., Xu, M. et al. Enhanced Magnetoresistance Effect and Magnetic Properties of Double Perovskite La2−xSrxMnRuO6 (0 ≤ x ≤ 1.0). J Supercond Nov Magn 34, 2673–2679 (2021). https://doi.org/10.1007/s10948-021-05956-1

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  • DOI: https://doi.org/10.1007/s10948-021-05956-1

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