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Preparation of superconductive P3 cobalt oxyhydrates Nax(H2O)yCoO2 with three-layered CoO2 using NaMnO4 solution

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Abstract

We report the synthesis of the superconductive P3 cobalt oxyhydrates by immersing α-NaCoO2 in aqueous NaMnO4 solution for the first time. It is a novel route to form the superconductive phase of cobalt oxyhydrates without resort to the commonly used Br2/CH3CN solution. Topotactic transformation of the parent compound α-NaCoO2 results in water intercalation and hence a significant expansion of the c-axis in the unit cell. The P3 cobalt oxyhydrates exhibits an onset superconducting transition at about 4.2 K.

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Acknowledgments

This work was supported by Ministry of Science and Technology of Taiwan under the Grant No. 101-2112-M-018-003-MY3 and 104-2112-M-018-002-MY3. Ankam Bhaskar would like to express thanks to the postdoctoral fellowship sponsored by MOST of Taiwan.

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  1. Department of Physics, National Changhua University of Education, Changhua, 500, Taiwan, Republic of China

    Ankam Bhaskar, Der-Hau Lee & Chia-Jyi Liu

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  1. Ankam Bhaskar
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  2. Der-Hau Lee
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  3. Chia-Jyi Liu
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Correspondence to Chia-Jyi Liu.

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Bhaskar, A., Lee, DH. & Liu, CJ. Preparation of superconductive P3 cobalt oxyhydrates Nax(H2O)yCoO2 with three-layered CoO2 using NaMnO4 solution. J Electroceram 37, 15–17 (2016). https://doi.org/10.1007/s10832-016-0014-5

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  • DOI: https://doi.org/10.1007/s10832-016-0014-5

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