High-pressure synthesis of a new homologous series of superconductors, (Hg{sub 1-x}Tl{sub x}){sub 2}Ba{sub 2}Ca{sub n-1}Cu{sub n}O{sub y} (0.3 {le} x {le} 0.6, n=3,4)
- SRL-ISTEC, Koto-ku, Tokyo (Japan); and others
The authors have recently synthesized new superconducting cuprates containing a mercury-based bilayer, i.e. (Hg, Tl){sub 2}Ba{sub 2}(Ca,Y)Cu{sub 2}O{sub y} and (Hg{sub 1{minus}x}Tl{sub x}){sub 2}Ba{sub 2}Ca{sub n{minus}1}Cu{sub n}O{sub y} (x {approximately} 0.4, n = 3,4) by a high-pressure technique. These compounds are the n= 2, 3, and 4 members of a new homologous series, (Hg,Tl)-22(n {minus} 1)n. The effects of Tl substitution for Hg on the formation and superconductivity of the (Hg,Tl)-2223 and -2234 phases are investigated. Both the phases are stabilized for the Tl content x of 0.3-0.6. T{sub c} of the as-synthesized (Hg,Tl)-2223 compound increases from 45 K to 81 K with an increase in x. In contrast, T{sub c} of the (Hg,Tl)-2234 compound is almost independent of x ({approximately}114 K).
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 443700
- Report Number(s):
- CONF-960808--
- Journal Information:
- Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 5-6 Vol. 105; ISSN 0022-2291; ISSN JLTPAC
- Country of Publication:
- United States
- Language:
- English
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