Enhancement ofT c (∼ 103 K) in calcium-free Tl2Ba2CuO x (2201) compound |
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| Authors: | K K Saini C P Sharma S N Ekbote Pavas Asthana D K Suri Kant Chander S A Agnihotry Subhas Chandra |
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| Affiliation: | (1) National Physical Laboratory, Dr K S Krishnan Road, 110012 New Delhi, India |
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| Abstract: | EnhancedT c in calcium-free Tl compounds of the series Tl m Ba2Ca n−1Cu n O x (2201) has been reported. Three different starting compositions (2201, 1201 and 2202) were studied extensively with varying conditions of preparation. Under optimized conditions (sintering temperature 970°C and duration 3–10 min) the highestT c(onset) ranges from 103 K to ∼ 115 K andT c (zero) ∼ 95 K was found. XRD studies showed the transformation of all the three nominal compositions into 2201 phase with differentT cs. |
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| Keywords: | Superconductivity T c enhancement Tl2Ba2Cu1O x |
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