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Magnetic Properties and Magnetoresistance Effect of Double Perovskite La2–xBaxMnRuO6

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Abstract

Ba-doping La2–xBaxMnRuO6 (x = 0, 0.1, 0.3, 0.5, and 1.0) double perovskites have been prepared by a conventional solid-state reaction method. The X-ray diffraction results indicate that the main diffraction peaks can be indexed as the orthorhombic structure with a space group of Pnma. Through Ba-doping on La-site, we find that the ferromagnetism is enhanced gradually, which can be attributed to the enhancement of ferromagnetic super-exchange interaction Mn3+-O2−-Ru4+. The Curie temperature increases with the increasing Ba2+ concentrations. For the electrical properties, all samples exhibit a semiconducting-like behavior. Meanwhile, the resistivity decreases monotonically with the increasing Ba-doping levels. The conduction mechanism can be well described by Mott’s three-dimensional variable range hopping model. Besides, the magnetoresistance (MR) effect increases with the rise of Ba concentrations at a certain temperature. Even at a high temperature of 200 K, an enhanced MR effect (~ 12%) can still be obtained in LaBaMnRuO6 at 7 T.

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Funding

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

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

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

    Zhong Chen, Xin Ding & Mingxiang Xu

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

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Chen, Z., Ding, X. & Xu, M. Magnetic Properties and Magnetoresistance Effect of Double Perovskite La2–xBaxMnRuO6. J Supercond Nov Magn 35, 2091–2098 (2022). https://doi.org/10.1007/s10948-022-06266-w

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