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Study of phase components of La1.5Ca1.5Mn2O7

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Abstract

The manganate with nominal composition La1.5Ca1.5Mn2O7, which is regarded as a single-phase compound with layered perovskite structure in the literature, was prepared using a standard ceramic process. The structures and morphology of the manganate were investigated by x-ray diffraction, transmission electron microscopy (TEM), scanning electron microscopy, and energy-dispersive x-ray microanalysis. However, no direct evidence of layered Sr3Ti2O7-type structure was observed in TEM experiments; instead, we observed multiphase mixtures of an orthorhombically distorted perovskite phase as majority and cubic perovskite phase as minority, as well as a small amount of calcium oxide. The measured magnetic and transport properties of this manganate arise mainly from the presence of hole-doped multiphase perovskite manganates. These physical properties demonstrated again the correctness of our phase component analysis.

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Authors and Affiliations

  1. Laboratory for Extreme Condition Physics, Institute of Physics, Center for Condensed Matter Physics, Beijing High Pressure Research Center, Chinese Academy of Sciences, P.O. Box 603, 100080, Beijing, People’s Republic of China

    J. L. Zhu, R. C. Yu, F. Y. Li & C. Q. Jin

  2. Beijing Laboratory of Electron Microscopy, Institute of Physics, Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 2724, 100080, Beijing, People’s Republic of China

    Z. Zhang

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  1. J. L. Zhu
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  2. R. C. Yu
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  3. F. Y. Li
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Zhu, J.L., Yu, R.C., Li, F.Y. et al. Study of phase components of La1.5Ca1.5Mn2O7. Journal of Materials Research 16, 2027–2031 (2001). https://doi.org/10.1557/JMR.2001.0277

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