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Superconductor-insulator transition induced by nanodefects in Y:123 bulk HTS

A. V. POP1,* , G. ILONCA1, V. POP2, E. DOROLTI1, D. MARCONI1

Affiliation

  1. Faculty of Physics, University Babes-Bolyai, 40084 Cluj-Napoca, Romania
  2. Department of Physics, Technical University, 3400 Cluj-Napoca, Romania

Abstract

The transition from superconductor to insulator was induced by partial substitution of Cu by Fe and by controlling oxygen content in YBa2(Cu0.96 Fe0.04)3Oy superconductor The effects of nanoscale defects induced by iron clusters and by oxygen content on the electrical resistance of underdoped system were studied. The origin of insulator behavior on electrical resistance above the superconducting transition is analyzed by using different localization mechanisms for mobile carriers..

Keywords

HTS synthesis, Nanodefects, EDX, Electrical resistance.

Submitted at: Nov. 1, 2006
Accepted at: March 15, 2007

Citation

A. V. POP, G. ILONCA, V. POP, E. DOROLTI, D. MARCONI, Superconductor-insulator transition induced by nanodefects in Y:123 bulk HTS, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 3, pp. 551-553 (2007)