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Superconductivity in the Pb-based 1222 Cuprate Containing Boron, (Pb0.5B0.5) Sr2(Y1.9−x Ce x Sr0.1)Cu2O z

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Abstract

We previously reported on the discovery of new Pb-based 1222 cuprates containing boron in the (Pb0.5B0.5)Sr2(RE2−x−y Ce x Sr y )Cu2O z (RE = Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Y) systems. However, none of the cuprates was a superconductor, but a semiconductor with the conduction process of a three-dimensional variable range hopping at low temperatures, despite annealing under O2 atmosphere at 100 atm and 400 °C. Recently, we have discovered that some samples showed superconductivity in the (Pb0.5B0.5)Sr2(Y1.9−x Ce x Sr0.1)Cu2O z system. Among them, the sample with x=0.45 shows the highest zero resistivity temperature at about 10 K and it shows a diamagnetic signal starting at abut 16 K with lowering temperature. The superconductivity is considered to originate from the 1222 phase.

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Authors and Affiliations

  1. Department of Physics, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu, Shizuoka, 431-3192, Japan

    Hiroyuki Sasakura & Yoshiya Akagi

  2. Department of Chemical Engineering, Graduate School of Engineering, Osaka Prefecture University, Sakai, Osaka, 599-8531, Japan

    Shigeki Tsukui & Motoaki Adachi

Authors
  1. Hiroyuki Sasakura
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  2. Yoshiya Akagi
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  3. Shigeki Tsukui
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  4. Motoaki Adachi
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Correspondence to Hiroyuki Sasakura.

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Sasakura, H., Akagi, Y., Tsukui, S. et al. Superconductivity in the Pb-based 1222 Cuprate Containing Boron, (Pb0.5B0.5) Sr2(Y1.9−x Ce x Sr0.1)Cu2O z . J Supercond Nov Magn 22, 755–758 (2009). https://doi.org/10.1007/s10948-009-0492-7

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  • DOI: https://doi.org/10.1007/s10948-009-0492-7

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