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Fluctuation-Induced Conductivity of Cu0.5Tl0.5Ba2Ca2Cu2M1O10−δ (M = Si, Sn, Ge) Superconductors

  • M. Irfan
  • Sajid Khan
  • Najmul Hassan
  • Nawazish Ali Khan
Original Paper

Abstract

Fluctuation-induced conductivity of Cu0.5Tl0.5Ba2Ca2Cu2M1O10−δ (M = Si, Sn, Ge) superconductors has been studied from the resistivity vs. temperature data. The logarithmic plots of excess conductivity (Δσ) vs. reduced temperatures [ε=(TT c mf )/T c mf ] show two crossover temperatures with three exponents. A distinct crossover from two-dimensional to three-dimensional conductivity in accordance with the 2D, 3D Aslamazov–Larkin equations has been observed in all the samples. Another crossover from 2D to 0D fluctuations has also been witnessed. FIC data analysis has been found to be quite useful in explaining the superconducting properties of the samples. Si and Sn doped samples have shown almost similar characteristics, while in Ge doped sample diverse behavior is observed.

Keywords

Cu0.5Tl0.5Ba2Ca2Cu2M1O10−δ (M = Si, Sn, Ge) superconductors Excess conductivity Ge doping Crossover temperature 

PACS

74.76.-w 74.76.Bz 74.72.-h 74.72.-Jt 

References

  1. 1.
    Bednorz, J.G., MGller, K.A.: Z. Phys. B 64, 189–193 (1986) CrossRefADSGoogle Scholar
  2. 2.
    Narlikar, A.V., Agarwal, S.K., Narsimha Rao, C.V.: In: Narlikar, A.V. (ed.) Studies of High Temperature Superconductors, p. 343. Nova Science, New York (1989) Google Scholar
  3. 3.
    Tarascon, J.M., Bagley, B.G.: In: Vanderaha, A. (ed.) Chemistry of High Temperature Superconductors, p. 310. Noyes, New York (1993) Google Scholar
  4. 4.
    Awana, V.P.S., Narlikar, A.V.: Phys. Rev. B 49, 6353–6355 (1994) CrossRefADSGoogle Scholar
  5. 5.
    Li, Y., Cao, G.H., Che, G.C., Zhao, Z.X., Ross, J.H. Jr., Baggio-Saitovitch, E.M.: Physica C 382, 243–250 (2002) CrossRefADSGoogle Scholar
  6. 6.
    Li, L.F., Zhang, Z., Zhouh, G.F., de Boerh, F.R.: J. Alloys Comp. 242, 95–97 (1996) CrossRefGoogle Scholar
  7. 7.
    Krause, T.W., Nkum, R.K., Datars, W.R.: Physica C 210, 333–342 (1993) CrossRefADSGoogle Scholar
  8. 8.
    Li, Y., Larrea, J.A., Baggio-Saitovitch, E., Che, G.C., Zhao, Z.X., Cao, G.H., Xu, Z.X.: Physica C 312, 283–288 (1999) CrossRefADSGoogle Scholar
  9. 9.
    Nkum, R.K., Datars, W.R.: Supercond. Technol. 5, 549 (1992) CrossRefADSGoogle Scholar
  10. 10.
    Khan, N.A., Irfan, M.: Physica C 468, 3241 (2008) Google Scholar
  11. 11.
    Aslamazov, G.L., Larkin, A.I.: Phys. Lett. 26A, 238 (1968) ADSGoogle Scholar
  12. 12.
    Lawrence, W.E., Doniach, S.: In: Kanada, E. (ed.) Proceedings of the 12th International Conference on Low-Temperature Physics, Kyoto, Japan, p. 361. Keigaku, Tokyo (1980) Google Scholar
  13. 13.
    Maki, K., Thompson, R.S.: Phys. Rev. B 39, 2767 (1988) CrossRefADSGoogle Scholar
  14. 14.
    Juang, J.Y., Hsieh, M.C., Luo, C.W., Uen, T.M., Wu, K.H., Gou, Y.S.: Physica C 329, 45 (2000) CrossRefADSGoogle Scholar
  15. 15.
    Bandyopadhyay, S.K., Barat, P., Kar, S.K., De, U., Mandal, P., Ghosh, B., Majumdar, C.K.: Solid State Commun. 82, 397 (1992) CrossRefADSGoogle Scholar
  16. 16.
    Bandyopadhyay, S.K., Sen, P., Barat, P., De, U., Mandal, K., Kar, S.K., Majumdar, C.K.: Physica C 267, 303 (1996) CrossRefADSGoogle Scholar
  17. 17.
    Sanyal, D., Mandal, K., De, U.: CPTA-98. Saha Institute of Nuclear Physics, Calcutta, February, 1998 Google Scholar
  18. 18.
    De, U., Mandal, K., Sanyal, D., Banerjee, D., Majumdar, C.K.: Regional meeting on radiation physics. Bose Institute, Calcutta (1995) Google Scholar
  19. 19.
    De, U., Sarkar, A., Sanyal, D., Banerjee, D., Kumar, R.: Proceedings of the International Workshop on High-T c Superconductors, p. 483. Rajshahi University, Bangladesh (1998) Google Scholar
  20. 20.
    Goldenfeld, N., Olmsted, P.D., Friedmann, T.A., Ginsberg, D.M.: Solid State Commun. 65, 465 (1988) CrossRefADSGoogle Scholar
  21. 21.
    Vidal, F., Veira, J.A., Maza, J., Miguelez, F., Moran, E., Alario, M.A.: Solid State Commun. 66, 421 (1988) CrossRefADSGoogle Scholar
  22. 22.
    Fontana, M.P., Pracchini, C., Paris De Renzi, C., Podini, P., Licci, F., Matacotta, F.C.: Solid State Commun. 69, 621 (1989) CrossRefADSGoogle Scholar
  23. 23.
    Dey, T.K., Radha, K., Barik, H.K., Bhattacharya, D., Chopra, K.L.: Solid State Commun. 74, 1315 (1990) CrossRefADSGoogle Scholar
  24. 24.
    Oh, B., Char, K., Kent, A.D., Naito, M., Beasley, M.R., Geballe, T.H., Hammond, R.H., Kapitulnik, A., Graybeal, J.M.: Phys. Rev. B 37, 7861 (1988) CrossRefADSGoogle Scholar
  25. 25.
    Pogrebnyakov, A.V., Yu, L.D., Freltoft, T., Vase, P.: Physica C 183, 27 (1991) CrossRefADSGoogle Scholar
  26. 26.
    Hagen, S.J., Wang, Z.Z., Ong, N.P.: Phys. Rev. B 38, 7137 (1988) CrossRefADSGoogle Scholar
  27. 27.
    Vidal, F., Viera, J.A., Maza, J., Ponte, J.J., Gracia-Alvarado, F., Moran, E., Amador, J., Calcales, C., Castro, A., Casais, M.T., Rasines, I.: Physica C 156, 807 (1988) CrossRefADSGoogle Scholar
  28. 28.
    Friedman, T.A., Rice, J.P., Jiapintzakis, J., Ginsberg, D.M., et al.: Phys. Rev. B 38, 4258 (1988) Google Scholar
  29. 29.
    Balestrino, G., Nigro, A., Vaglio, R.: Phys. Rev. B 39, 264 (1989) CrossRefGoogle Scholar
  30. 30.
    Ravi, S., Bai, V.S.: Physica C 182, 345 (1991) CrossRefADSGoogle Scholar
  31. 31.
    Poddar, A., Mandal, P., Das, A.N., Ghosh, B., Choudhury, P.: Physica C 161, 567 (1989) CrossRefADSGoogle Scholar
  32. 32.
    Mandal, P., Podder, A., Das, A.N., Gosh, B., Chaudhary, P.: Physica C 169, 43 (1990) CrossRefADSGoogle Scholar
  33. 33.
    Wnuk, J.J., Schreurs, L.W.M., Eggenkamp, P.J.T., van der Linden, P.J.E.M.: Physica B 165–166, 1371 (1990) CrossRefGoogle Scholar
  34. 34.
    Ihara, H.: Bull. Electrochem. Lab. 58, 447 (1994) Google Scholar
  35. 35.
    Irfan, M., Hassan, N., Khan, N.A.: Physica C 469, 86 (2009) CrossRefADSGoogle Scholar
  36. 36.
    Hassan, N., Khan, N.A.: J. Appl. Phys. 104, 103902 (2008) CrossRefADSGoogle Scholar
  37. 37.
    Khan, N.A., Ashraf, F., Mumtaz, M., Haider, N.: J. Supercond. Nov. Magn. 21, 279 (2008) CrossRefGoogle Scholar
  38. 38.
    Hassan, N., Khan, N.A.: Mater. Chem. Phys. 112, 412 (2008) CrossRefGoogle Scholar
  39. 39.
    Mumtaz, M., Khan, N.A.: Supercond. Sci. Technol. 20, 1228 (2007) CrossRefADSGoogle Scholar
  40. 40.
    Ghosh, A.K., Bandyopadhyay, S.K., Barat, P., Sen, P., Basu, A.N.: Physica C 255, 319 (1995) CrossRefADSGoogle Scholar
  41. 41.
    Ghosh, A.K., Bandyopadhyay, S.K., Basu, A.N.: J. Appl. Phys. 86, 3247 (1999) CrossRefADSGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • M. Irfan
    • 1
  • Sajid Khan
    • 1
  • Najmul Hassan
    • 1
  • Nawazish Ali Khan
    • 1
  1. 1.Materials Science Laboratory, Department of PhysicsQuaid-i-Azam UniversityIslamabadPakistan

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