Book ChapterDOI
Effect of post-annealing on Tc in Pb-doped Bi-2223 superconductors
Jie Wang,Mitsunobu Wakata,Tetsuyuki Kaneko,Satoshi Takano,Hisao Yamauchi +4 more
- pp 291-294
TLDR
In this article, a single-phase (Bi,Pb)-2223 superconductors with nominal composition of Bi1.85Pb0.35Sr2−xCa2+xCu3.1Oy (x=0 and 0.1) were synthesized.Abstract:
(Bi,Pb)-2223 superconductors with nominal composition of Bi1.85Pb0.35Sr2−xCa2+xCu3.1Oy (x=0 and 0.1) were synthesized. They are virtually single-phase and show Tc (mag.) around 109K~110K. By applying an encapsulation and low temperature post-annealing process, Tc increased to 115 K by SQUID measurement. From the resistivity, thermoelectric power measurements and the evolution of the lattice constants, it is suggested that the increases in Tc may due to the decreases in hole concentration.read more
Citations
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Patent
Process of annealing BSCCO-2223 superconductors
TL;DR: In this article, a BSCCO-2223 oxide superconducting article is annealed for a time sufficient to provide at least a 10% increase in critical current density as compared to the pre-anneal oxide superconductor article.
Patent
Processing of oxide superconductors
TL;DR: In this article, a BSCCO-2223 oxide superconducting article is annealed for a time sufficient to provide at least a 10% increase in critical current density as compared to the pre-anneal oxide superconductor article.
Patent
Reaction for high performance (Bi,Pb)2 Sr2 Ca2 Cu3 Oy composites
Qi Li,William J. Michels,Ronald D. Parrella,Gilbert N. Riley,Mark D. Teplitsky,Steven Fleshler +5 more
TL;DR: In this paper, a (Bi,Pb)SCCO-2223 oxide superconductor composite is presented, which exhibits improved critical current density and critical density retention in the presence of magnetic fields.
Patent
High performance (Bi,Pb)2Sr2Ca2Cu3Oy composites
Qi Li,William J. Michels,Ronald D. Parrella,Gilbert N. Riley,Mark D. Teplitsky,Steven Fleshler +5 more
TL;DR: In this paper, a (Bi,Pb)SCCO-2223 oxide superconductor composite is presented, which exhibits improved critical current density and critical density retention in the presence of magnetic fields.
References
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Journal ArticleDOI
A New High-TcOxide Superconductor without a Rare Earth Element
TL;DR: In this paper, a new high-Tc oxide superconductor of the BiSrCa-Cu-O system without any rare earth element was discovered, which has Tc of about 105 K, higher than that of YBa2Cu3O7 by more than 10 K.
Journal ArticleDOI
Bulk superconductivity at 120 K in the Tl-Ca/Ba-Cu-O system
Z.Z. Sheng,Allen M. Hermann +1 more
TL;DR: In this paper, stable and reproducible bulk superconductivity with an onset at 120 K and zero resistance above 100 K in the Tl-Ca/Ba-Cu-O system was reported.
Journal ArticleDOI
Structure and physical properties of single crystals of the 84-K superconductor Bi 2.2 Sr 2 Ca 0.8 Cu 2 O 8+δ
Steven A. Sunshine,Theo Siegrist,Lynn Schneemeyer,Donald W. Murphy,Robert J. Cava,Bertram Batlogg,R. B. van Dover,R. M. Fleming,S. H. Glarum,S. Nakahara,Reginald C. Farrow,J. J. Krajewski,S. M. Zahurak,Joseph V. Waszczak,J. H. Marshall,P. Marsh,L. W. Rupp,W. F. Peck +17 more
TL;DR: La structure a des plans [CuO 2 ] ∞ separes par des atomes de calcium, des couches doubles d'oxyde de bismuth and a un niveau incommensurable le long de b avec une periode de 4,76
Journal ArticleDOI
High- T c superconducting phases in the series Bi 2.1 (Ca, Sr) n+l Cu n O 2n+4+δ
Jeffery L. Tallon,R. G. Buckley,P.W. Gilberd,M.R. Presland,I. W. M. Brown,Mark E. Bowden,L. A. Christian,R. Goguel +7 more
TL;DR: In this paper, three distinct phases in the homologous series Bi2.1 were identified and indexed on a pseudo-tetragonal subcell with a = b = 5.4 A and c = 24.6 A. The critical temperature for these phases is sharply dependent on the Sr/Ca ratio and oxygen stoichiometry, as determined by heat treatment.
Journal ArticleDOI
Zero resistance at 132K in the multiphase system of Bi1.9−xPbxSb0.1Sr2Ca2Cu3Oy with x=0.3, 0.4
Liu Hongbao,Cao Liezhao,Zhou Ling,Mao Zhiqiang,Li Xiaoxian,Yu Zhidong,Xue Bai,Mao Xiangle,Zhou Guien,Run Yaozhong,Chen Zhaojia,Zhang Yuheng +11 more
TL;DR: In this article, the superconducting properties of the multiphase compounds of (Bi 1.9− x Pb x Sb 0.1) Sr 2 Ca 2 Cu 3 O y have been investigated.