Table of Contents
International Journal of Superconductivity
Volume 2014 (2014), Article ID 768714, 7 pages
http://dx.doi.org/10.1155/2014/768714
Research Article

Electrical Transport and Lowered Percolation Threshold in YBa2Cu3O7−δ-Nano-YBa2ZrO5.5 Composites

Electronic Materials Research Laboratory, Department of Physics, Mar Ivanios College, Thiruvananthapuram, Kerala 695015, India

Received 10 May 2014; Accepted 6 August 2014; Published 25 August 2014

Academic Editor: Dong Qian

Copyright © 2014 Pullanhiyodan Puthiyaveedu Rejith et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Linked References

  1. T. van Duzer, “Superconductor electronics,” Cryogenics, vol. 30, no. 12, pp. 980–995, 1990. View at Publisher · View at Google Scholar · View at Scopus
  2. T. van Duzer, “Superconductor electronics and power applications,” Proceedings of the IEEE, vol. 100, no. 11, pp. 2993–2995, 2012. View at Publisher · View at Google Scholar · View at Scopus
  3. N. McN Alford, T. W. Button, and J. D Birchall, “Processing, properties and devices in high-Tc superconductors,” Superconductor Science and Technology, vol. 3, no. 1, 1990. View at Publisher · View at Google Scholar
  4. T. K. Worthington, W. J. Gallagher, and T. R. Dinger, “Anisotropic nature of high-temperature superconductivity in single-crystal Y1Ba2Cu3O7-x,” Physical Review Letters, vol. 59, no. 10, pp. 1160–1163, 1987. View at Publisher · View at Google Scholar · View at Scopus
  5. D. R. Harshman, G. Aeppli, E. J. Ansaldo et al., “Temperature dependence of the magnetic penetration depth in the high-Tc superconductor Ba2YCu3O9-φ: evidence for conventional s-wave pairing,” Physical Review B, vol. 36, no. 4, pp. 2386–2389, 1987. View at Publisher · View at Google Scholar · View at Scopus
  6. A. Davidson and M. Tinkham, “Phenomenological equations for the electrical conductivity of microscopically inhomogeneous materials,” Physical Review B, vol. 13, no. 8, pp. 3261–3267, 1976. View at Publisher · View at Google Scholar · View at Scopus
  7. J. W. Essam, “Percolation theory,” Reports on Progress in Physics, vol. 43, no. 7, pp. 833–912, 1980. View at Publisher · View at Google Scholar · View at MathSciNet
  8. M. Sahimi, Application of Percolation Theory, Taylor & Francis, London, UK, 1994.
  9. K. Osamura, N. Matsukura, Y. Kusumoto, S. Ochiai, B. Ni, and T. Matsushita, “Improvement of critical current density in YBa2Cu3O6+x superconductor by Sn addition,” Japanese Journal of Applied Physics, vol. 29, no. 9, pp. L1621–L1623, 1990. View at Google Scholar · View at Scopus
  10. S. H. Wee, A. Goyal, Y. L. Zuev, C. Cantoni, V. Selvamanickam, and E. D. Specht, “Formation of self-assembled, double-perovskite, Ba2YNbO6 nanocolumns and their contribution to flux-pinning and Jc in Nb-doped YBa2Cu3O7-δ films,” Applied Physics Express, vol. 3, no. 2, Article ID 023101, 2010. View at Publisher · View at Google Scholar · View at Scopus
  11. M. Coll, S. Ye, V. Rouco et al., “Solution-derived YBa2Cu3O7-δ nanocomposite films with a Ba2YTaO6 secondary phase for improved superconducting properties,” Superconductor Science and Technology, vol. 26, no. 1, Article ID 015001, 2012. View at Publisher · View at Google Scholar · View at Scopus
  12. P. P. Rejith, S. Vidya, S. Vipinlal Solomon, and J. K. Thomas, “Flux-pinning properties of nanocrystalline HfO2 add YBa2Cu3O7-δ superconductor,” Physica Status Solidi B, vol. 251, pp. 809–814, 2014. View at Google Scholar
  13. S. A. Harrington, J. H. Durrell, B. Maiorov et al., “rare earth tantalate pyrochlore nanoparticles for superior flux in YBa2Cu3O  7-δ films,” Superconductor Science and Technology, vol. 22, no. 2, Article ID 022001, 2009. View at Publisher · View at Google Scholar
  14. Y. P. Yadava, E. Montarroyos, J. M. Ferreira, and J. Albino Aguiar, “Synthesis and study of the structural characteristics of a new complex perovskite oxide Sr2HoHfO5.5 for its use as a substrate for YBCO superconducting films,” Physica C: Superconductivity, vol. 354, no. 1–4, pp. 444–448, 2001. View at Publisher · View at Google Scholar · View at Scopus
  15. J. Koshy, J. K. Thomas, J. Kurian, Y. P. Yadava, and A. D. Damodaran, “Development and characterization of GdBa2NbO6, a new ceramic substrate for YBCO thick films,” Materials Letters, vol. 17, no. 6, pp. 393–397, 1993. View at Publisher · View at Google Scholar · View at Scopus
  16. R. Jose, A. M. John, J. K. Thomas et al., “Synthesis, crystal structure, dielectric properties, and potential use of nanocrystalline complex perovskite ceramic oxide Ba2ErZrO5.5,” Materials Research Bulletin, vol. 42, no. 12, pp. 1976–1985, 2007. View at Publisher · View at Google Scholar · View at Scopus
  17. K. V. Paulose, M. T. Sebastian, K. R. Nair, J. Koshy, and A. D. Damodaran, “Synthesis of Ba2YZrO6: a new phase in YBa2Cu3O7 -ZrO2 system and its suitability as a substrate material for YBCO films,” Solid State Communications, vol. 83, no. 12, pp. 985–988, 1992. View at Publisher · View at Google Scholar · View at Scopus
  18. J. M. Phillips, “Substrate selection for high-temperature superconducting thin films,” Journal of Applied Physics, vol. 79, no. 4, pp. 1829–1848, 1996. View at Publisher · View at Google Scholar · View at Scopus
  19. S. Vidya, K. C. Mathai, P. P. Rejith, S. Solomon, and J. K. Thomas, “SmBa2NbO6 nanopowders, an effective percolation network medium for YBCO superconductors,” Advances in Materials Science and Engineering, vol. 2013, Article ID 578434, 7 pages, 2013. View at Publisher · View at Google Scholar
  20. J. Kurian, P. R. S. Wariar, P. K. Sajith, and J. Koshy, “Percolation behavior of the normal-state resistivity and superconductivity of the YBa2Cu3O7-δ-Ba2GdNbO6 composite system,” Journal of Superconductivity and Novel Magnetism, vol. 11, no. 6, pp. 683–687, 1998. View at Google Scholar · View at Scopus
  21. P. R. S. Wariar, J. Koshy, J. Kurian, Y. P Yadava, and A. D Damodaran, “Percolation studies in SmBa2SbO6-YBa2Cu3O7-δ composite system,” Modern Physics Letters B, vol. 9, no. 10, p. 585, 1995. View at Publisher · View at Google Scholar
  22. H. Tovar, O. O. Díaz, D. A. L. Téllez, and J. Roa-Rojas, “Ba2NdZrO5.5 as a potential substrate material for YBa2Cu3O7-δ superconducting films,” Physica Status Solidi C: Current Topics in Solid State Physics, vol. 4, no. 11, pp. 4294–4297, 2007. View at Publisher · View at Google Scholar · View at Scopus
  23. O. O. Diaz, L. D. López Carreño, J. Albino Aguiar, J. Roa-Rojas, and D. A. Landínez Téllez, “tructural ordering, chemical stability and percolative effect analysis in YSr2SbO6/YBa2Cu3O7-δ complex perovskite composites,” Physica C, vol. 408–410, pp. 886–888, 2004. View at Google Scholar
  24. Q. Madueño, D. A. Landínez Téllez, and J. Roa-Rojas, “Production and characterization of Ba2NdSbO6 complex perovskite as a substrate for YBa2Cu3O7-δ superconducting films,” Modern Physics Letters B, vol. 20, p. 427, 2006. View at Publisher · View at Google Scholar
  25. K. V. Paulose, M. K. Jayaraj, J. Koshy, and A. D. Damodaran, “Preparation and properties of Ba2YZrO6YBa2Cu3O7 composites,” Solid State Communications, vol. 87, no. 2, pp. 147–150, 1993. View at Publisher · View at Google Scholar · View at Scopus
  26. R. Jose, J. James, A. M. John, D. Sundararaman, R. Divakar, and J. Koshy, “New combustion process for nanosized YBa2ZrO5.5 powders,” Nanostructured Materials, vol. 11, no. 5, pp. 623–629, 1999. View at Publisher · View at Google Scholar · View at Scopus
  27. J. J. Lin, W. Y. Lin, and R. F. Tsui, “Electrical transport and superconductivity in the Al2O3-Bi2Sr1.8Ca1.2Cu2Oy and MgO-Bi2Sr1.8Ca1.2Cu2Oy composites,” Physica C, vol. 210, no. 3-4, pp. 455–462, 1993. View at Google Scholar · View at Scopus
  28. M. Eisterer, J. Emhofer, S. Sorta, M. Zehetmayer, and H. W. Weber, “Connectivity and critical currents in polycrystalline MgB2,” Superconductor Science and Technology, vol. 22, no. 3, Article ID 034016, 2009. View at Publisher · View at Google Scholar
  29. D. Stauffer and A. Aharony, Introduction to Percolation Theory, Taylor and Francis, 1994.
  30. J. Wu and D. S. McLachlan, “Percolation exponents and thresholds obtained from the nearly ideal continuum percolation system graphite-boron nitride,” Physical Review B, vol. 56, no. 3, pp. 1236–1248, 1997. View at Google Scholar · View at Scopus