Superconducting properties of Tl1?yPbyCaSr2Cu2O7: Role of Pb and oxygen stoichiometry

Vijayaraghavan, R and Rao, CNR (1992) Superconducting properties of Tl1?yPbyCaSr2Cu2O7: Role of Pb and oxygen stoichiometry. In: Solid State Communications, 83 (1). pp. 73-76.

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Abstract

In the Tl1-yPbyCaSr2Cu2O7 system, monophasic superconducting compositions are formed in the range 0.25 < y < 0.60 and the minimum Pb content required to stabilize the tetragonal 1122 phase is about 25%. Maximum Tc is found when y = 0.5, at which composition the hole concentration is optimal. Metallic compositions of Tl1?yPbyCaSr2Cu2O7 (y = 0.25) and Tl0.75Pb0.25Y1?xCaxSr2Cu2O7 (0.80 less-than-or-equals, slant X less-than-or-equals, slant 1.0) become superconducting on decreasing the oxygen content by vacuum annealing.

Item Type:	Journal Article
Additional Information:	Copyright of this article belongs to Elsevier science.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	30 May 2011 06:08
Last Modified:	30 May 2011 06:08
URI:	http://eprints.iisc.ernet.in/id/eprint/37736

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