Novel 1122 thallium cuprates showing high Tc superconductivity: TlCa1-xY,Ba2Cu2O y,T,1-xPb x CaSr2Cu2O y and TlCa0.5Ln0.5Sr2Cu2O y |
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| Authors: | A K Ganguli R Vijayaraghavan C N R Rao |
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| Institution: | Solid State and Structural Chemistry Unit, Indian Institute of Science , Bangalore, 560012, India |
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| Abstract: | Substitution of Ca by Y in TlCaBa2Cu2O y does not favour superconductivity, but substitution of Tl by Pb or of Ca by Ln (Ln = Y or rare earth) in TlCaSr2Cu2O y results in high Tc superconductivity (Tc π 60–90 K). TlCa1-xLn x Sr2Cu2O y is a new series of high Tc superconductors, but the x = 0.0 composition does not exhibit bulk superconductivity. |
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| Keywords: | TlCa1-xY x Ba2Cu2O y Tl1-xPb x CaSr2Cu2O y TlCa0 5Ln0 5Sr2Cu2O y TlCa1-xLn x Sr2Cu2O y high temperature superconductivity |
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