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The Structure, Vacancy Defects, and Magnetic Properties of GdMnO3 Ceramics Modulated by Lu Substitution

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Abstract

This investigation studies the influences of Lu substitution for Gd on the structure, vacancy defects, and magnetic properties in GdMnO3 ceramics synthesized using solid state reaction method. The structure measurements indicate that all of the Gd1-xLuxMnO3 ceramics show single-phase structure, the introduction of Lu3+ ions induces structure distortion. All samples with irregular grain shape have relatively dense microstructure, and the Lu3+ ions substitution promotes the grain growth. Positron annihilation experimental results indicate that Lu3+ ions substitution can influence the vacancies size and concentration, and the vacancies concentration increases with the increase of Lu3+ concentration. The evolution of the temperature and magnetic field–dependent magnetization curves presents that Lu3+ ions substitution could obviously affect the magnetic state of GdMnO3, improve the magnetic transition temperature, and magnetization of Gd1-xLuxMnO3. It is found that the enhanced magnetization of Gd1-xLuxMnO3 has a close relationship with vacancies concentration.

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Funding

This work is supported by the National Natural Science Foundation of China (11775192, 12005194), the Natural Science Foundation of Henan Province (212102210132, 212102210489, 212300410092), and the Postgraduate Education Reform and Quality Improvement Projects in Henan Province (No. HNYJS2021AL027).

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Authors and Affiliations

  1. School of Physics and Electronic Engineering, Henan Key Laboratory of Magnetoelectronic Information Functional Materials, Zhengzhou University of Light Industry, Zhengzhou, 450002, China

    Dewei Liu, Qijie Zhang, Jing Chen, Xuezhen Zhai, Tao Li & Haiyang Dai

  2. XJ Wind Power Technology Company, Xuchang, 461000, China

    Xinghua Dai & Ruijie Zhao

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  1. Dewei Liu
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  2. Qijie Zhang
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  3. Xinghua Dai
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  4. Ruijie Zhao
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  6. Xuezhen Zhai
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  7. Tao Li
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  8. Haiyang Dai
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Correspondence to Haiyang Dai.

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Liu, D., Zhang, Q., Dai, X. et al. The Structure, Vacancy Defects, and Magnetic Properties of GdMnO3 Ceramics Modulated by Lu Substitution. J Supercond Nov Magn 35, 3543–3549 (2022). https://doi.org/10.1007/s10948-022-06359-6

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