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Oxygen Configuration in the Superconductor (Hg0.7Mo0.3)Sr2(Ca1−xRx)Cu2Oz (R = Nd and Pr)

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Abstract

Two series of Hg-based oxides (Hg0.7Mo0.3)Sr2(Ca1−x R x )Cu2O z (R = Nd and Pr, 0.2 ≤ x ≤ 0.7) have been synthesized. Electrical-resistivity measurements show that these compounds are superconductors with maximum onset T c of 107 and 102 K for Nd- and Pr-containing samples, respectively. The neutron powder diffraction experiments on both as-prepared and O2-annealed samples of R = Nd revealed that the O(3) site at the HgOδ sheets are fully occupied and shifted towards the Hg/Mo site to form Mo–O bonds.

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Author notes

  1. E. Kandyel

    Present address: Superconductivity Research Laboratory, ISTEC, Shinonome, Koto-ku, Tokyo, 135-0062, Japan

  2. K. Oikawa

    Present address: Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki, 319-1195, Japan

Authors and Affiliations

  1. Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki, 305-8573, Japan

    E. Kandyel, T. Kamiyama, K. Oikawa, S. Torii & H. Asano

  2. Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt

    E. Kandyel

  3. Department of Materials Structure Science, Graduate University for Advanced Studies, Tsukuba, Ibaraki, 305-0801, Japan

    K. Mori

  4. Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt

    M. A. Sekkina

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  1. E. Kandyel
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  2. T. Kamiyama
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  3. K. Oikawa
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  4. S. Torii
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  5. K. Mori
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  6. H. Asano
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  7. M. A. Sekkina
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Kandyel, E., Kamiyama, T., Oikawa, K. et al. Oxygen Configuration in the Superconductor (Hg0.7Mo0.3)Sr2(Ca1−xRx)Cu2Oz (R = Nd and Pr). Journal of Superconductivity 13, 111–119 (2000). https://doi.org/10.1023/A:1007738528912

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