Phase Intergrowth in the Syntheses of BSCCO Thin Films

  • Park, No-Bong (Department of Electrical Engineering, Chungju National University) ;
  • Park, Yong-Pil (Department of Electrical & Electronic Eng., Dongshin University)
  • Published : 2002.08.01


Phase intergrowth some kinds of the $Bi_2Sr_2Ca_{n-1}Cu_nO_y$ phases is observed in the thin film fabrication at ultralow co-deposition with multi targets by means of ion beam sputtering. The molar fraction of the Bi2212 phase in the mixed crystal of the grown films is investigated as a function of the applied ozone pressure and the substrate temperature. The activation energy for the phase transformation from the Bi2201 to the Bi2212 is estimated in terms of the Avrami equation. This study reveals that the formation of a liquid phase contributes significantly to the construction of the Bi2212 phase in the thin films, differing from the bulk synthesis.


  1. T. Umezawa, D. J. Lew, S. K. Streiffer, and M. R. Beasley, "Josephson coupling in a-axis $YBa_2Cu_3O_{7-{\delta}}/\;Pr_{1-x}Y_xBa_2Cu_3O_{7-{\delta}}/\;YBa_2Cu_3O_{7-{\delta}}$ sandwich-type junctions", Appl. Phys. Lett., Vol. 63. No. 23, p. 3221, 1993.
  2. S. J. Pennycook, M. F. Chisholm, D. E. Jesson, D. P. Norton, D. H. Lowndes, R. Feenstra, H. R. Kerchner, and J. O. Thom son, "Interdiffusion, growth mechanism, and criti alcurrents in $Ba_2Cu_3O_{7-x}/PrBa_2Cu_3O_{7-x}$ superlattices", Phys. Rev. Lett., Vol. 67. No. 6, p. 765, 1991.
  3. S. H. Yang and Y. P. Park, "Comparison between Bi-superconducting thin films fabri- cated co-deposition and layer-by-layer deposition", J. of KIEEME(in Korean), Vol. 13, No. 9, p. 796, 2000.
  4. J. H. Ahn, Y. P. Park, and J. B. Wang, 'Fabrication condition for single phase of Bisuperconductor thin film', Trans. on EEM, Vol. 2, No. 4, p. 11, 2001
  5. H. K. Lee and Y. P. Park, 'Evaluation of ozone condensation system by T.D. method', Trans. on EEM, Vol. 1, No. 2, p. 18, 2000.
  6. S. Hendricks and E. Teller, "X-ray interference in partially ordered layer lattices", J. Chem. Phys., Vol. 10, No. 3, p. 147, 1942
  7. L. Ranno. D. Martinez-Garcia, J. Perriere, and P. Barboux, "Phase intergrowth in $Bi_2Sr_2Ca_{n-1}Cu_nO_y$ thin film", Phys. Rev. B, Vol. 48. No. 13, p. 13945, 1993
  8. M. Ohkubo. J. Geerk, G. Linker, and O. Mayer, "Phase intergrowth in $Bi_2Sr_2Ca_1Cu_3O_x$ superconducting thin films prepared by single cylindrical-sputtering gun", Appl. Phys. Lett., Vol. 67, No. 16, p. 2403, 1995
  9. J. L. MaeMaus-Driscoll, P. C. Wang. J. C. Bravman, and R. B. Bcyers, "Phase equilibria and melt processing of $Bi_2Sr_2Ca_1Cu_2O{8+x}$ tapes at reduced oxygen partial pressure", Appl. Phys. Lett, Vol. 65, No. 22, p. 2872, 1994
  10. J. Polouka, M. Xu, A. I. Goldman, and D. K. Finnemore, "Effect of oxygen on the melting and freezing of $Bi_2Sr_2Ca_1Cu_2O_{8+\delta}$", J. Appl, Phys., Vol. 74, No. 12, p. 7397, 1993
  11. H. K. Lee, Y. P. Park, K. H. Lee, and J. U. Lee, "Evaluation of sticking coefficient in BSCCO thin film fabricated by cosputtering", J. of KIEEME(in Korean), Vol. 13, No. 1, p. 80, 2000
  12. J. W. Christian, "The Theory of Transformations in Metals and Alloys", 2nd ed., Pergamon, Oxford, 1976
  13. J. S. Luo. N. Merchant, E. Escoria-Aparicio, V. A. Maroni, D. M. Gruen, B. S. Tani, G. N. Riley Jr., and W. L. Carter, "Phase chemistry and microstructure evolution in silver clad $(Bi_{2-x}Pb_x)Sr_2Ca_2Cu_3O_y$ wires", IEEE Trans. Appl. Supercond., Vol. 3. No. 1, p. 972, 1993