Superconductivity studies on Tl-Th-Sr-Ca-Cu-O system
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In this paper, the authors show that the 1212 phase gets stabilized due to part substitution of Th at the Tl-site forx⩾0·25; however, Tc is low forx < 0·75.Abstract:
Superconductivity with a maximumTc, zero of 58 K forx > 0·75 has been observed in a nominal starting composition, ThxTl2Sr2Ca2Cu3Oy. X-ray data show that the 1212 phase gets stabilized due to part substitution of Th at the Tl-site forx⩾0·25; however,Tc is low forx<0·75.read more
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Journal ArticleDOI
Superconductivity in the rare-earth-free Tl–Ba–Cu–O system above liquid-nitrogen temperature
Z.Z. Sheng,Allen M. Hermann +1 more
TL;DR: In this paper, the authors reported superconductivity in the rare earth-free TI-Ba-Cu-O system with a resistance starting at 90 K with zero resistance at 81 K.
Book ChapterDOI
Bulk superconductivity at 125 K in Tl2Ca2Ba2Cu3Ox.
Stuart S. P. Parkin,V. Y. Lee,Edward M. Engler,A. I. Nazzal,T. C. Huang,G. Gorman,R. J. Savoy,Robert Beyers +7 more
TL;DR: In this paper, a trilayer Cu perovskitelike units separated by bilayer TI-O units were found in T12Ca2 Ba2 Cu3 Ox with a transition to zero resistance at ≃ 125 K.
Journal ArticleDOI
Bulk superconductivity up to 122 K in the Tl-Pb-Sr-Ca-Cu-O system
Munirpallam A. Subramanian,C. C. Torardi,Jagannatha Gopalakrishnan,Pratibha L. Gai,Joseph C. Calabrese,T. R. Askew,R.B. Flippen,Arthur W. Sleight +7 more
TL;DR: New high-temperature superconductors based on oxides of thallium and copper, but not containing barium, have been prepared with structure refinement carried out with single-crystal x-ray diffraction data.
Journal ArticleDOI
Model family of high-temperature superconductors: TlmCan-1Ba2CunO2(n+1)+m (m=1,2; n=1,2,3).
TL;DR: Variations in the transition temperatures in the double- and triple-CuO/sub 2/-layer compounds are observed to correlate with increased densities of intergrowths of related structures.
Journal ArticleDOI
Preparation and superconducting properties of (Tl,Bi)Sr2CaCu2Oy
S. Li,Martha Greenblatt +1 more
TL;DR: In this article, the high-Tc superconducting compound (Tl,Bi)Sr2CaCu2Oy ( y∼7, Tl Bi ∼1 and Tc∼95 K) was prepared by solid state reaction using Sr2Tl2O7 as a precursor Tl-containing material.
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