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Charge ordering and magnetic properties of LaxSm0.5-xCa0.5MnO3 manganite

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Abstract

In this paper, the effect of La3+ doping on the structure, charge ordering and magnetic properties of Sm0.5Ca0.5MnO3 manganite has been studied. A series of LaxSm0.5-xCa0.5MnO3 (x = 0, 0.25, 0.375, 0.5) samples are prepared by traditional solid state reaction. The crystal structures are studied by X-ray diffraction technology. The results show that they are single-phase and orthorhombic structures. The change of La3+ ion concentration does not change the crystal structure of the samples. The surface morphology and particle size of the samples are studied by scanning electron microscope. The average particle size of the samples is several micrometers. Energy-dispersive spectrometer is used to detect the composition of the samples. The results show that the actual element composition of the samples is consistent with that of the modulated element. Magnetic properties are analyzed by magnetization versus temperature (M–T) curves and magnetic hysteresis (M-H) loops. Below 50 K, the zero-field-cooling (ZFC) and field-cooling (FC) M–T curves diverge obviously, which is a typical feature of spin glass transition. The ZFC and FC M–T curves show a significant protuberance peak between 215 and 274 K, which represents the existence of charge-ordered (CO) anti-ferromagnetic (AFM) state. With increasing La3+ ion doping concentration, the CO temperature gradually decreases. Moreover, the butterfly-type M-H loops also confirm the existence of CO-AFM phase in samples. In a few words, the competition between FM and AFM phases determines the charge ordering behavior and magnetic properties of the samples.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (11604067, U1832143, 51702289, 51601049, 11704091). The authors would like to thank colleagues from Beijing Synchrotron Radiation Facility (BSRF) and Shanghai Synchrotron Radiation Facility (SSRF) for their help in XRD experiments.

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Authors and Affiliations

  1. Key Laboratory of Novel Materials for Sensor of Zhejiang Province, Institute of Material Physics, Hangzhou Dianzi University, Hangzhou, 310018, China

    Yan Wang, Hui Zhang, Haiou Wang, Dexin Yang, Shuai Huang, Kunpeng Su & Dexuan Huo

  2. All-Solid-State Energy Storage Materials and Devices Key Laboratory of Hunan Province, College of Information and Electronic Engineering, Hunan City University, Yiyang, 413002, China

    Weishi Tan

  3. Key Laboratory of Soft Chemistry and Functional Materials, Ministry of Education, Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, 210094, China

    Weishi Tan

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  1. Yan Wang
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  2. Hui Zhang
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Wang, Y., Zhang, H., Wang, H. et al. Charge ordering and magnetic properties of LaxSm0.5-xCa0.5MnO3 manganite. J Mater Sci: Mater Electron 32, 18721–18727 (2021). https://doi.org/10.1007/s10854-021-06391-7

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  • DOI: https://doi.org/10.1007/s10854-021-06391-7

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