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Synthesis of Superconductor $YBa_{2}Cu_{4}O_{8}$ by Pyrolysis of EDTA Complex

  • Published : 1992.12.20

Abstract

The superconducting $YBa_2Cu_4O_8$ was synthesized in oxygen condition at 1 atm. The starting material with 1 : 2 : 4 composition was obtained by pyrolysis of EDTA complex, which was converted to 1-2-3 phase during densification, followed by the 1-2-4 phase recovery at $810^{\circ}C$ . The phase presents were identified by XRD, TG, DTA and AC magnetic susceptibility. Our data indicated that considerable amounts of 1-2-4 phase formed but with the 1 : 2 : 3 phase or possibly 2-4-7 as visible. As the P($O_2$) increased with temperature, impurity peak, CuO ($2{\Theta}$ = 38.8), gradually decrease, and we conclude that the 1-2-4 phase is predominant bulk superconductor under the high oxygen pressure.

Keywords

References

  1. Nature v.331 H. W. Zandbergen;R. Gronsky;K. Wang;G. Thomas
  2. Phys. Rev. v.B37 A. F. Marshall;R. W. Barton;K. Char;A. Kapitulnik;B. Oh;R. H. Hammond;S. S. Laderman
  3. Phys. Rev. v.B38 K. Char;Mark, Lee;R. W. Barton;A. F. Mashall;I. Bozovic;R. H. Hammond;M. R. Beasley;T. H. Geballe;A. Kapitulnik;S. S. Laderman
  4. Nature v.336 J. Karpinski;E. Kardis;E. Jilek;S. Rusiecki;B. Bucher
  5. Phys. Rev. v.B39 D. E. Morris;J. H. Nickel;J. Y. T;Wei;N. G. Asmar;J. S. Scott;U. M. Scheven;C. T. Hultgren;A. G. Markelz;J. E. Post;P. J. Heaney;D. R. Veble;R. M. Hazen
  6. Solid State Commun v.69 P. Fisher;J. Kapinski;E. Kaldis;E. Jilek;S. Rusiecki
  7. Nature v.334 P. Marsh;R. M. Fleming;M. L. Mandich;A. M. Desantlo;J. Kwo;M. Hong;L. J. Martinez-Miranda
  8. Appl. Phys. Lett. v.54 R. M. Hazen;L. W. Finger;D. E. Morris
  9. Jpn. J. Appl. Phys. v.29 H. Murakami;S. Yaegashi;J. Shiohara;S. Tanaka
  10. Nature v.338 R. J. Cava;J. J. Karjerwski;W. F. Peck;Jr. B. Batlogg;L. W. Rupp;Jr. R. M. Fleming;A. C. W. P. James;P. Marsh
  11. Solid State Commun. v.77 P. Guptasarma;V.R. Palkar;M. S. Multani
  12. Appl. Phys. Lett. v.57 T. Wada;N. Suzuki;A. Ichinose;Y. Yaegashi;H. Yamauchi;S. Tanaka
  13. Japan. J. Appl. Phys. v.29 T. Wada;N. Suzuki;A. Ichinose;Y. Yaegashi;H. Yamauchi;S. Tanaka

Cited by

  1. ChemInform Abstract: Synthesis of Superconductor YBa2Cu4O8 by Pyrolysis of EDTA Complex. vol.24, pp.18, 1992, https://doi.org/10.1002/chin.199318035