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Article
XPS study on the site occupation of Sr7 Ca and Y ions in Bi2212 superconductors
The mutual substitution effect of Sr and Ca on superconductivity in the Bi2Sr2−x Ca1+x−y Y y Cu2O8+d (y=0.1) system has investiga...
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Article
Tc, onset, fluctuation and intergrain connection in the Bi2−xGexSr2CaCu2O8+δ
Resistive transitions in Bi2−xGexSr2CaCu2O8+δ(x=0-0.3) prepared by the solid state reaction method were investigated. The Tc,onset’s of the as sintered pellets were approximately 74 K and 80 K for x=0 and x>0 res...
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Article
On the correlations between Sr:Ca substitution and structural modulation in the Bi-2212 phase
XPS and chemical titration both were carried out on Bi2+xSr1.8CaCu2O z and Bi2Sr1.8−y Ca1+y Cu2O z prepared by...