# Superconductivity in the $Bi_2(Ca, Sr)_{n+1}Cu_nO_{2n+4}$ (n=1, 2, or 3) series: Synthesis, characterization and mechanism

Rao, CNR and Ganapathi, L and Vijayaraghavan, R and Rao, Ranga G and Murthy, Kumari (1988) Superconductivity in the $Bi_2(Ca, Sr)_{n+1}Cu_nO_{2n+4}$ (n=1, 2, or 3) series: Synthesis, characterization and mechanism. In: Physica C: Superconductivity, 156 (5). pp. 827-833.

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## Abstract

The n= 1, 2 and 3 members of the $Bi_2(Ca, Sr)_{n+1}Cu_nO_{2n + 4}$ series of superconductors have been synthesized and characterized by a variety of techniques including electrical resistivity, magnetic susceptibility and non-resonant microwave absorption. Based on studies with a number of compositions, the $T_c$ ranges for the n = 1, 2 and 3 members are suggested to be 60 \pm 20 K, 82 \pm 8 K. and 107 \pm 3 K, the rather broad ranges arising from differences in sample stoichiometry and homogeneity. Electron spectroscopic studies show that Cu is mainly in the 2+ and 1 + states suggesting the importance of oxygen holes.

Item Type: Journal Article Copyright of this article belongs to Elsevier Science. Division of Chemical Sciences > Solid State & Structural Chemistry Unit 26 Feb 2008 19 Sep 2010 04:42 http://eprints.iisc.ernet.in/id/eprint/13096