"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Tc behaviour of 2212 and 2223 phases in (Bi,Pb)Sr(Ca2-xYx)CuO/2223

V. MIHALACHE1,* , G. ALDICA1

Affiliation

  1. National Institute of Materials Physics, Bucharest-Magurele, POB MG-7, 077125, Romania

Abstract

The critical temperature, Tc, for (Bi,Pb)Sr(Ca2-x,Yx)CuO/2223, with x between 0 and 0.45, polycrystalline samples have been investigated. Tc of (Bi,Pb)2Sr2Ca2-xYxCu3O10+δ phase, 2223, found in samples with x<0.05, decreases whereas Tc of (Bi,Pb)2Sr2Ca1-xYxCu2O8+δ phase, 2212, found in samples with x>0.05, displays a parabolic dependence with the increase of Y content. The change of Tc for 2223 originates mainly from the increase of x. The variation of both x and oxygen content, δ, influences the Tc of 2212. The doping state of 2212 and 2223 in Y substituted samples suggests that, generally, in the samples consisting of both superconducting phases, 2212 is in over-doped state whereas 2223 is in under-doped state. The last affirmation suggests that 2212 could bring a significant contribution in the transport parameters of (Bi,Pb)SrCaCuO/2223 samples..

Keywords

2223, 2212, Y substitution, Critical temperature, Doping state.

Submitted at: Nov. 2, 2006
Accepted at: April 15, 2007

Citation

V. MIHALACHE, G. ALDICA, Tc behaviour of 2212 and 2223 phases in (Bi,Pb)Sr(Ca2-xYx)CuO/2223, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 4, pp. 919-922 (2007)