The Enhancement of T_c in Calcium Free Tl-Bilayer Superconducting System (Tl_2Ba_2Cu_1O_x)
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概要
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The observation of enhanced T_c in calcium free Tl compounds Tl_2Ba_2Cu_1O_x (2201) with varying concentration of Tl and Cu has been reported. Three different starting compositions (2201, 1201 and 2202) were studied extensively with varying conditions of preparation. Under the optimised conditions: sintering temperature 970℃ and duration 3-10 minutes the highest T_c (onset) 〜115 K and T_c (zero) 〜95 K was found. The XRD studies showed the transformation of all the three nominal compositions into 2201 phase with different T_cs.
- 社団法人応用物理学会の論文
- 1990-04-20
著者
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Sharma C.
National Physical Laboratory
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Suri D.
National Physical Laboratory
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Chandra Subhas
National Physical Laboratory
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Asthana Pavas
National Physical Laboratory
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SAINI K.
National Physical Laboratory
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EKBOTE S.
National Physical Laboratory
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AGNIHOTRY S.
National Physical Laboratory
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