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Modification of the sperconducting parameters of Bi-Sr-Ca-Cu-O by iodine intercalation

V. MIHALACHE1,* , G. ALDICA1, D. MIU2

Affiliation

  1. National Institute for Materials Physics, P. O. Box MG-7, RO-76900, Bucharest-Magurele, Romania
  2. National Institute for Laser, Plasma, and Radiation Physics, P. O. Box MG-36, 77125 Bucharest-Magurele, Romania

Abstract

We investigated the superconducting parameters of iodine-intercalated BiSrCaCuO high-temperature superconducting materials. While for samples containing a significant amount of Bi2Sr2CaCu2O8+x (Bi-2212) iodine intercalation results in the dramatic decrease of the superconducting parameters, it was found that for samples with a nearly single Bi2Sr2Ca2Cu3O10-y (Bi-2223) phase these parameters can increase. We argue that this different behavior of the superconducting parameters is the result of a different doping regime, and can be explained based on the parabolic dependence between Tc and the number of holes per CuO2 layer. Iodine intercalation appears to be an efficient way to bring the usually under-doped superconductor to its optimal Tc and flux pinning properties..

Keywords

Bi-based high-temperature superconductors, Iodine intercalation, Superconducting parameters.

Submitted at: March 3, 2006
Accepted at: May 18, 2006

Citation

V. MIHALACHE, G. ALDICA, D. MIU, Modification of the sperconducting parameters of Bi-Sr-Ca-Cu-O by iodine intercalation, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 3, pp. 1287-1291 (2006)