The European Physical Journal B

, Volume 58, Issue 2, pp 107–113 | Cite as

Coherence transition in granular YBa2Cu3O7-δ, YBa2Cu2.95Zn0.05O7-δ, and YBa1.75Sr0.25Cu3O7-δ superconductors

  • R. Menegotto Costa
  • L. Mendonça Ferreira
  • V. N. Vieira
  • P. PureurEmail author
  • J. Schaf
Solids and Liquids


We have studied experimentally the electrical magneto-conductivity near the superconducting transition of YBa2Cu3O7-δ, YBa2 (Cu2.95Zn0.05)O7-δ and Y(Ba1.75Sr0.25)Cu3O7-δ polycrystalline samples. The measurements were performed in magnetic fields ranging from 0 to 400 Oe applied parallel to the current orientation. The results show that the resistive transition of these systems proceeds in two stages. The pairing transition occurs at the bulk critical temperature Tc, where superconductivity is stabilized within small and homogeneous regions of the sample generically called grains. The regime of approach to the zero resistance state reveals the occurrence of a coherence transition at a lower temperature Tc0. This transition is related to the connective nature of the granular samples and is controlled by fluctuations of the order-parameter phase of individual grains. Our experiments show that the Zn-doping, besides depressing the pairing critical temperature, strongly enlarges the temperature range dominated by effects related to the coherence transition. The substitution of Ba by Sr causes only a small reduction of Tc, but also enhances significantly the effects related to the grain coupling phenomenology. In general, our results indicate that these impurity substitutions in YBa2Cu3O7-δ produce or magnify the granularity at a microscopic level, enhancing the effects of phase fluctuations in the conductivity near the transition.


74.40.+k Fluctuations 74.72.Bk Y-based cuprates 74.81.Bd Granular, melt-textured, amorphous, and composite superconductors 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. J. Mannhart, P. Chaudari, D. Dimos, C.C. Tsuei, T.R. McGuire, Phys. Rev. Lett. 61, 2476 (1988) CrossRefADSGoogle Scholar
  2. R. Gross, P. Chaudari, D. Dimos, A. Gupta, G. Koren, Phys. Rev. Lett. 64, 228 (1990) CrossRefADSGoogle Scholar
  3. H. Hingenkamp, J. Mannhart, Rev. Mod. Phys. 74, 485 (2002) CrossRefGoogle Scholar
  4. K.M. Lang, V. Madhavan, J.E. Hoffman, E.W. Hudson, H. Eisaki, S. Uchida, J.C. Davis, Nature 415, 412 (2002) CrossRefADSGoogle Scholar
  5. E. Liarokapis, D. Palles, D. Lampakis, G. Böttger, K. Conder, E. Kaldis, Phys. Rev. B 71, 014303 (2005) CrossRefADSGoogle Scholar
  6. M. Daeumling, J.M. Seuntjens, D.C. Larbalestier, Nature 346, 332 (1990) CrossRefADSGoogle Scholar
  7. A Gerber, T. Grenet, M. Cyrot, J. Beille, Phys. Rev. Lett. 65, 3201 (1990) CrossRefADSGoogle Scholar
  8. P. Pureur, J. Schaf, M.A. Gusmão, J.V. Kunzler, Physica C 176, 357 (1991) CrossRefADSGoogle Scholar
  9. J. Roa-Rojas, R. Menegotto Costa., P. Pureur, P. Prieto, Phys. Rev. B 61, 12457 (2000) CrossRefADSGoogle Scholar
  10. A. Raboutou, P. Peyral, C. Lebeau, J. Rosenblatt, J.P. Burin, Y. Fouad, Physica A 207, 271 (1994) CrossRefADSGoogle Scholar
  11. J. Rosenblatt, P. Peyral, A. Raboutou, C. Lebeau, Physica B 152, 95 (1988) CrossRefADSGoogle Scholar
  12. M.P.A. Fischer, T.A. Tokuyasu, A.P. Young, Phys. Rev. Lett. 66, 2931 (1991) CrossRefADSGoogle Scholar
  13. W.Y. Shih, C. Ebner, D. Stroud, Phys. Rev. B 30, 134 (1984) CrossRefADSGoogle Scholar
  14. H. Kawamura, M.S. Li, J. Phys. Soc (Jpn) 66, 2110 (1997) CrossRefADSGoogle Scholar
  15. M. Siegrist, T.M. Rice, Rev. Mod. Phys. 67, 503 (1995) CrossRefADSGoogle Scholar
  16. L.N. Bulaevskii, V.V. Kuzii, A.A. Sobyanin, Solid State Commun. 25, 1053 (1978) CrossRefGoogle Scholar
  17. B.I. Spivak, S.A. Kivelson, Phys. Rev. B 43, 3740 (1991) CrossRefADSGoogle Scholar
  18. P. Peyral, C. Lebeau, J. Rosenblatt, A. Raboutou, C. Perrin, O. Peña, M. Sergent, J. Less-Common Met. 151, 151 (1989) CrossRefGoogle Scholar
  19. J. Roa-Rojas, P. Pureur, L. Mendonça-Ferreira, M.T.D. Orlando, E. Baggio-Saitovitch, Supercond. Sci. Technol. 14, 898 (2001) CrossRefADSGoogle Scholar
  20. F.W. Fabris, J. Roa-Rojas, P. Pureur, Physica C 354, 304 (2001) CrossRefADSGoogle Scholar
  21. F. Wolff Fabris, P. Pureur, Physica C 408–410 688 (2004) Google Scholar
  22. P.K. Nayak, S. Ravy, Solid State Commun. 140, 464 (2006) CrossRefADSGoogle Scholar
  23. M. Kaur, R. Srinivasan, G.K. Mehta, D. Kanjilal, R. Pinto, S.B. Ogale, S. Mohan, V. Ganesan, Physica C 443, 61 (2006) CrossRefADSGoogle Scholar
  24. A.R. Jurelo, I. Abrego Castillo, J. Roa-Rojas, L.M. Ferreira, L. Ghivelder, P. Pureur, P. Rodrigues Jr, Physica C 311, 133 (1999) CrossRefADSGoogle Scholar
  25. C.J. Lobb, Phys. Rev. B 36, 3930 (1987) CrossRefADSGoogle Scholar
  26. P. Pureur, R. Menegotto Costa, P. Rodrigues, Jr, J. Schaf, J.V. Kunzler, Phys. Rev. B 47, 11420 (1993) CrossRefADSGoogle Scholar
  27. R. Menegotto Costa, P. Pureur, L. Ghivelder, J.A. Campá, I. Rasines, Phys. Rev. B 56, 10836 (1997) CrossRefGoogle Scholar
  28. R. Menegotto Costa, P. Pureur, M. Gusmão, S. Senoussi, K. Behnia, Phys. Rev. B 64, 214513 (2001) CrossRefADSGoogle Scholar
  29. B. Jayaram, S.K. Agarwal, C.V.N. Rao, A.V. Narlikar, Phys. Rev. B 38, 2903 (1988) CrossRefADSGoogle Scholar
  30. S. Zagoulev, P. Monod, J. Jégoudez, Phys. Rev. B 52, 10474 (1995) CrossRefADSGoogle Scholar
  31. H. Kimura, Physica C 392–396, 34 (2003) Google Scholar
  32. Y. Zhao, H. Zhang, T. Zhang, S.F. Sun, Z.Y. Chen, Q.R. Zhang, Physica C 152, 513 (1988) CrossRefADSGoogle Scholar
  33. Y. Takeda, R. Kando, O. Yamamoto, M. To, Z. Hiroi, Y. Bando, M. Shimita, H. Akinaga, K. Takita, Physica C 157, 358 (1989) CrossRefADSGoogle Scholar
  34. V.N. Vieira, P. Pureur, J. Schaf, Physica C 353, 241 (2001) CrossRefADSGoogle Scholar
  35. A.R. Jurelo, J.V. Kunzler, J. Schaf, P. Pureur, J. Rosenblatt, Phys. Rev. B 56 14815 (1997) Google Scholar
  36. B. Nachumi, A. Keren, K. Kojima, M. Larkin, G.M. Luke, J. Merrin, O. Tchernyshöv, Y.J. Uemura, N. Ichikawa, M. Goto, S. Uchida, Phys. Rev. Lett. 77 5421 (1996) Google Scholar
  37. D.S. Fischer, M.P.A. Fischer, D.A. Huse, Phys. Rev. B 43, 130 (1991) CrossRefADSGoogle Scholar
  38. M. Ausloos, Ch. Laurent, Phys. Rev. B 37, 611 (1988) CrossRefADSGoogle Scholar
  39. J.S. Kouvel, M.E. Fisher, Phys. Rev. 136, A1616 (1964) Google Scholar
  40. C. Wengel, A.P. Young, Phys. Rev. B 56, 5918 (1997) CrossRefADSGoogle Scholar
  41. A. Zippelius, Phys. Rev. B 29, 2717 (1984) CrossRefADSGoogle Scholar
  42. S. Li, M. Fistul, J. Deak, P. Metcalf, M. McElfresh, Phys. Rev. B 52, (1995) R747 Google Scholar
  43. R.J. Joshi, R.B. Hallock, J.A. Taylor, Phys. Rev. B 55, 9107 (1997) CrossRefADSGoogle Scholar
  44. T. Olson, A.P.Young, Phys. Rev. B 61, 12467 (2000) CrossRefADSGoogle Scholar
  45. M.B. Salamon, Jing Shi, Neil Overend, M.A. Howson, Phys. Rev. B 47, 5520 (1993) CrossRefADSGoogle Scholar
  46. J. Kötzler, M. Kaufmann, G. Nakielski, R. Behr, W. Assmus, Phys. Rev. Lett. 72, 2081 (1994) CrossRefADSGoogle Scholar
  47. M.P.A. Fischer, Phys. Rev. Lett. 62, 1415 (1989) CrossRefADSGoogle Scholar

Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Authors and Affiliations

  • R. Menegotto Costa
    • 1
  • L. Mendonça Ferreira
    • 2
  • V. N. Vieira
    • 3
  • P. Pureur
    • 2
    Email author
  • J. Schaf
    • 2
  1. 1.Instituto de Ciências Exatas e Tecnológicas, Centro Universitário FeevaleNovo HamburgoBrazil
  2. 2.Instituto de Física, Universidade Federal do Rio Grande do SulPorto AlegreBrazil
  3. 3.Instituto de Física e Matemática, Universidade Federal de PelotasPelotasBrazil

Personalised recommendations