Electrical Properties of High Tc Superconductors Using the Pyrolysis Method for Renewed Electric Power Energy

  • Lee Sang-Heon (Department of Electronic Engineering, Sun Moon University)
  • Published : 2005.10.01

Abstract

We have fabricated a superconducting YBCO system according to the pyrolysis method and low pressure apparatus. In our experiment, the X-ray diffraction pattern of the non doped YBaCuO layer indicated that the superconductor contained only 90K phase crystal. The critical temperature and critical current density for a thick layer at $650^{\circ}C$ were Tc=90 K and $Jc=6{\times}10^{4}A/cm^2$ at 90K. In low pressure apparatus, the 90 K phase YBaCuO was grown at a lower temperature compared with the normal system. Tc and Jc at $650^{\circ}C$ were Tc = 90 K and $Jc=6{\times}10^{4}A/cm^2$ at 90K.

Keywords

References

  1. P. N. Peters, R. C. Sick, E. W. Urban, C. Y. Huang, and M. M. Wu, 'Observation of Enhanced Properties in samples of Silver Oxide doped $YBa_2Cu_3O_7$', Appl. Phys. Lett., Vol. 52, p. 2066, 1988
  2. M. Murakami, T. Oyama, H. Fujimoto, T. Taguchi, S.Gotoh, Y. Shiohara, N. Koshizuki, and S. Tanaka, 'Large Levitation Force due to Flux Pinning in YBaCuO Superconductors Fabricated by Melt- Powder-Melt-Growth Process ', Jpn. J. Appl. Phys., Vol. 29, No. 11, L1991, 1990
  3. Y. Dimitriev and E. Kashchieva, 'Charge-density Transport Properties', J. Mater. Sci., Vol. 10, No. 2, p. 1419, 1995
  4. M. K. Wu, J. R. Ashburn, C. J. Torng, P. H. Hor, R. L. Meng, L. Lao, Z. J. Huang, Y. Q. Wang, and C. W. Chu, 'Superconductivity at 93 K in a New Mixedphase Y-Ba-Cu-O Compound System at Ambient Pressure', Phys. Rev. Lett., Vol. 58, No. 9, p. 908, 1987
  5. Y. Iijima, M. Hosaka, N. Tanabe, N. Sadakata, T. Saitoh, O. Kohno, and K. Takeda, J. Mater. Res., 'Biaxial alignment control of YBCO films on random Ni-based alloy with textured YSZ films formed by ion-beam-assisted deposition', Vol. 12, p. 2913, 1997
  6. H. Asaoka and H. Takei, 'Crystal Growth Mechanism of $YBa_2Cu_3O_x$ from Coexisting Region of Solid with Melt', Jpn. J. Appl. Phys., Vol. 33, No. 7A, p. 923, 1994
  7. S. Jin, T. H. Tiefel, R. C. Sherwood, R. B. van Dover, M. E. Davis, G. W. Kammlott, and R. A. Fastnacht, 'Melt-textured Growth of Polycrystalline $YBa_2Cu_3O_{7-\delta}$ with High Transport $J_c$ at 77 K', Phys. Rev. B, Vol. 37, No. 13, p. 7850, 1988 https://doi.org/10.1103/PhysRevB.37.7850
  8. G. W. Kammlott, T. H. Tiefel, and S. Jin, 'Recovery of 90 K Superconductivity in Transition-melt-doped Y-Ba-Cu-O', Appl. Phys. Lett., Vol. 56, No. 24, p. 2459, 1990
  9. K. Osamura, N. Matsukura, Y. Kusumoto, S. Ochiai, B. Ni, and T. Matsushita, 'Improvement of Critical Current Density in $YBa_2Cu_3O_{6+x}$ Superconductor by Sn Addition', Jpn. J. Appl. Phys., Vol. 29, No. 9, p. L1621, 1990