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The Effects of Transition Metal Substitutions for Copper in the Bi-Sr-Ca-Cu-O Superconducting System

Published online by Cambridge University Press:  28 February 2011

J.C. Bennett ,
F.W. Boswell ,
J.M. Corbett ,
S. Kohara  and
F.S. Razavi
J.C. Bennett
Affiliation:
Dept. of Physics, University of Waterloo, Waterloo, Ont., Canada N2L 3G1
F.W. Boswell
Affiliation:
Dept. of Physics, University of Waterloo, Waterloo, Ont., Canada N2L 3G1
J.M. Corbett
Affiliation:
Dept. of Physics, University of Waterloo, Waterloo, Ont., Canada N2L 3G1
S. Kohara
Affiliation:
Dept. of Physics, University of Waterloo, Waterloo, Ont., Canada N2L 3G1
F.S. Razavi
Affiliation:
Dept. of Physics, Brock University, Ste. Catharines, Ont., Canada
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Abstract

The effects of transition metal dopants on superconductivity in samples of nominal composition Bi2CaSr2(Cu1-xMx)208+δ with M = Co, Fe, Ni and Zn have been investigated for 0 ≤ x ≤ 1. Co and Fe additions progressively suppress the ? of the doped material and result in semiconducting behaviour for x ≤ 0.2. In the ranges 0 ≤ x ≤ .07 and near x = 1.0, x-ray diffraction reveals the samples are essentially single phase but are multiphase otherwise. Ni and Zn dopants have only a very slight effect on Tc; however, EDX analysis reveals these elements are not significantly Incorporated into the superconducting phase.

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