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Superconductivity in Pseudo-Quaternary System

  • P. C. Yao (a1), C. I. Chiang (a1), C. W. Hsieh (a1), J. W. Chen (a1), I. N. Lin (a1), S. J. Yang (a1) and S. E. Hsu (a1)...

Abstract

The superconductivity of pseudo-quternary system Y1−xMx Ba2 Cu3 O7-δ, YBa2 Cu3−xM x O7-δ, where M stands Co,Cr,&Zn and with x=0,0.001,0.005,0.01 & 0.02, has been investigated.

The XRD analysis shows that the perovskite structure is preserved and a stabilization effect on orthorhombic structure by 3d elements addition was proposed. On the contrary, the microstructure has been modified prominently and it is determined by the sintering mechanism involved and/or diffusion process in each doped sample. Second phase precipitate can be found at grain surface. The superconductivity, however, has not been greatly affected.

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References

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1. Xiao, Gang, Streitz, F.H., Gavrin, A., Du, Y.W. and Chien, C.L. Phy. Rev. B35, 8782–84 (1987).
2. Maeno, Yoshiteru, Nojjma, Tsutomu, Aoki, Yuji, Kato, Masatsune, Hoshino, Kenichi, Minami, Asao and Fujita, Toshizo, Jap. J. Appl. Phys., 26(5) L77476 (1987).
3. Dunn, Thomas M., “Crystal Field Theory”, (Happer & ROW, Publishers, New York) 1965.
4. Tarascon, J.M., Mckinnon, W.R., Greene, L.H., Hull, G.W. and Vogel, E.M., Phy. Rev. B 36(1), 226234 (1987).

Superconductivity in Pseudo-Quaternary System

  • P. C. Yao (a1), C. I. Chiang (a1), C. W. Hsieh (a1), J. W. Chen (a1), I. N. Lin (a1), S. J. Yang (a1) and S. E. Hsu (a1)...

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