Journal of Superconductivity and Novel Magnetism

, Volume 25, Issue 2, pp 305–309 | Cite as

Synthesis of New Pb-Based 1222 Cuprates Containing Phosphorus, (Pb0.75P0.25)Sr2(RE2–xy Ce x Sr y )Cu2O z (RE = Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Y)

  • Hiroyuki Sasakura
  • Yoshiya Akagi
  • Masashi Tanaka
  • Shigeki Tsukui
  • Motoaki Adachi
Original Paper


New Pb-based 1222 cuprates containing phosphorus have been synthesized in the (Pb0.75P0.25)Sr2- (RE2–xy Ce x Sr y )Cu2O z (RE = Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Y) systems. The almost-single phase samples are obtained for 0.5≤x≤1.0 and y=0.1 in the cases of RE = Nd, Dy, Ho, Er, Tm, Yb and Y, while for 0.3≤x≤1.0 and y=0.1 in the cases of RE = Sm, Eu and Gd. The samples crystallize in a tetragonal lattice, the lattice parameters a and c are decreasing with the decrease of the ionic radius of the RE element. Even after annealing under 143 atm O2 atmosphere at 400 °C, almost all the samples with the common values x=0.5 and y=0.1 are semiconductors with a transport process followed by three-dimensional variable range hopping. However, the samples of RE = Sm, Eu and Gd, which are of almost single 1222 phase, even for x=0.3 and y=0.1, show superconductivity with the onsets at about 25 K, 20 K and 22 K, respectively. Through this study, we find very important procedure for discovery of new superconducting 1222 compound.


New Pb-based layered cuprate 1222 phase (Pb0.75P0.25)Sr2(RE2–xy Cex SryCu2Oz Superconductivity 


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  1. 1.
    Adachi, S., Inoue, O., Kawashima, S., Adachi, H., Ichikawa, Y., Setsune, K., Wasa, K.: Physica C 168, 1 (1990) ADSCrossRefGoogle Scholar
  2. 2.
    Maeda, T., Sakuyama, K., Koriyama, S., Ichinose, A., Yamauchi, H., Tanaka, S.: Physica C 169, 133 (1990) ADSCrossRefGoogle Scholar
  3. 3.
    Min, J., Liang, J., Wang, C., Wu, F., Chen, H., Dong, C., Rao, G.: J. Phys., Condens. Matter 7, 5982 (1995) ADSCrossRefGoogle Scholar
  4. 4.
    Luo, H.M., Qu, B., Chen, Z.Y., Qian, Y.T., Yang, L.: Physica C 270, 253 (1996) ADSCrossRefGoogle Scholar
  5. 5.
    Sasakura, H., Akagi, Y., Tsukui, S., Adachi, M.: J. Supercond. Nov. Magn. 21, 249 (2008) CrossRefGoogle Scholar
  6. 6.
    Sasakura, H., Akagi, Y., Tsukui, S., Adachi, M.: J. Supercond. Nov. Magn. 22, 755 (2009) CrossRefGoogle Scholar
  7. 7.
    Sasakura, H., Akagi, Y., Tanaka, M., Tsukui, S., Adachi, M.: J. Supercond. Nov. Magn. 24, 1623 (2011) CrossRefGoogle Scholar
  8. 8.
    Sasakura, H., Akagi, Y., Tanaka, M., Tsukui, S., Adachi, M.: J. Supercond. Nov. Magn. (2011). Published online. doi: 10.1007/s10948-011-1286-2
  9. 9.
    Shannon, R.D.: Acta Crystallogr. A, Found. Crystallogr. 32, 751 (1976) ADSCrossRefGoogle Scholar
  10. 10.
    Mott, N.F., Davis, E.A.: Electron Process in Non-Crystalline Materials. Clarendon, Oxford (1971) Google Scholar
  11. 11.
    Paracchini, C., Calestani, G., Francesconi, M.G.: Physica C 167, 249 (1990) ADSCrossRefGoogle Scholar
  12. 12.
    Jayaram, B., Lanchester, P.C., Weller, M.T.: Phys. Rev. 43, 5444 (1991) ADSCrossRefGoogle Scholar
  13. 13.
    Sasakura, H., Akagi, Y., Hayashi, Y.: Physica B 194/196, 2273 (1994) ADSCrossRefGoogle Scholar
  14. 14.
    Cao, G., Wang, S., Quian, Y., Yu, W., Chen, Z., Lu, B., Zhang, Y.: Physica C 243, 113 (1995) ADSCrossRefGoogle Scholar
  15. 15.
    Sasakura, H.: Physica C 292, 125 (1997) ADSCrossRefGoogle Scholar
  16. 16.
    Sasakura, H., Tagaya, K., Akagi, Y., Oka, T., Tsukui, S., Adachi, M., Oshima, R.: J. Supercond. Nov. Magn. 14, 581 (2001) Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Hiroyuki Sasakura
    • 1
  • Yoshiya Akagi
    • 1
  • Masashi Tanaka
    • 2
    • 4
  • Shigeki Tsukui
    • 3
  • Motoaki Adachi
    • 3
  1. 1.Department of PhysicsHamamatsu University School of MedicineHamamatsuJapan
  2. 2.Department of PhysicsShizuoka UniversitySuruga-kuJapan
  3. 3.Department of Chemical EngineeringGraduate School of Engineering, Osaka Prefecture UniversitySakaiJapan
  4. 4.Department of Applied ChemistryGraduate School of Engineering, Hiroshima UniversityHiroshimaJapan

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