ISSN:
1573-7357
Schlagwort(e):
74.72.−h
;
74.72.Jt
;
74
;
81.20.−n
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract We have recently synthesized new superconducting cuprates containing a mercury-based bilayer, i.e. (Hg,Tl)2Ba2(Ca,Y)Cu2Oy and (Hg1−x Tlx)2Ba2 Can−1 CunOy (x ∼ 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−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. Tc of the as-synthesized (Hg,Tl)-2223 compound increases from 45 K to 81 K with an increase in x. In contrast, Tc of the (Hg,Tl)-2234 compound is almost independent of x (∼114 K).
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00753922
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