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Study on the Structure, Vacancy Defect, and Magnetic Properties for Gd1−xCexMnO3 Ceramics

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Abstract

The effects of the Ce doping on the structure, vacancy defect, and magnetic properties of the Gd1−xCexMnO3 polycrystalline samples fabricated by the solid-state reaction method were studied. All Gd1−xCexMnO3 samples exhibit single-phase structure, and Ce doping causes structure distortion without any structural transition. The microstructure of the synthesized samples is compact, and Ce doping reduces the grain size. XPS result shows that the charge compensation induced by Ce doping is achieved mainly by the decrease of cation valence (forming Mn2+) in the x = 0.00–0.05 ceramics, while the decrease of oxygen vacancies concentration plays dominant role in the x = 0.10–0.20 ceramics. The positron annihilation spectrum (PAS) measurement shows that Ce doping has a great influence on the cation vacancy size and concentration of Gd1−xCexMnO3 samples; the vacancy concentration increases with Ce doping content. Ce doping could obviously improve the transition temperatures and magnetization of the Gd1−xCexMnO3. This investigation demonstrates that the cation vacancy concentration is one of the important factors that could tailor the magnetic properties of Gd1−xCexMnO3 ceramics.

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Funding

This study was supported by the National Natural Science Foundation of China (11775192 and 12005194) and the Natural Science Foundation of Henan Province (212300410092).

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  1. College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, 450002, China

    Yong Zhang

  2. School of Physics and Electronic Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450002, China

    Haizeng Liu

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Correspondence to Haizeng Liu.

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Zhang, Y., Liu, H. Study on the Structure, Vacancy Defect, and Magnetic Properties for Gd1−xCexMnO3 Ceramics. J Supercond Nov Magn 34, 3229–3236 (2021). https://doi.org/10.1007/s10948-021-06054-y

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  • DOI: https://doi.org/10.1007/s10948-021-06054-y

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