Effect of Pb Doping on the Superconducting Properties of (Cu0.5−x Pb x Tl0.5)Ba2Ca2Cu3O10−δ

Khan, Nawazish A.; Ullah, Sami

doi:10.1007/s10948-010-0770-4

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…The Tl/Sr system can be written as TlSr 2 Ca n-1 Cu n O z with n = 1-3 (Lee, 2011 (Subramanian et al, 1988), Bi 3+ (Li and Greenblatt, 1988) or Cr 3+ (Sheng et al, 1989;Li et al, 1995;Abd-Shukor and Jaafar, 1999) may assist the formation of Tl-1212 phase. Critical temperature around 100 K of the Bi-substituted sample in Tl-1212 (i.e., (Tl,Bi)Sr 2 CaCu 2 O 7 ) has been reported (Abd-Shukor and Tee, 1998), Pb-doped (Cu 0.5-x Pb x Tl 0.5 ) Ba 2 Ca 2 Cu 3 O 10-δ superconductor was reported with a Tc of 115 K (Nawazish and Ullah, 2010). The effect of rare earth elements was found to favor the formation of the Tl-1212 phase (Eder and Gritzner, 2005).…”

Section: Introductionmentioning

confidence: 98%

FORMATION OF Tl-1212 PHASE in Cr SUBSTITUTED (Tl1-xCrx) Sr2CaCu2O7 SUPERCONDUCTOR

Ranjbar¹

2012

Physics International

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Superconducting samples of (Tl 1-x Cr x ) Sr 2 CaCu 2 O 7 for x = 0.0-0.7 have been prepared by a solid state reaction technique at normal pressure using high purity elements. The powder X-ray diffraction patterns have been studied for samples. All samples showed the Tl-1212 as the major phase and Tl-1201 as the minor phase. The superconducting transition temperature Tc has been determined from the electrical resistivity measurements. The data of Tc, for (Tl 1-x Cr x ) Sr 2 CaCu 2 O 7 show enhancement in its value from 104 K to112 K as x (Cr-content) increases from 0.7 to 0.1. Our results shows the highest onset temperature for x = 0.2-0.3 and the lowest temperature for x = 0.7.

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