Origin of the 110-K superconducting transition in the Bi-Sr-Ca-Cu-O system

Tarascon, J. M.; LePage, Y.; Greene, L. H.; Bagley, B. G.; Barboux, P.; Hwang, D. M.; Hull, G. W.; McKinnon, W. R.; Giroud, M.

doi:10.1103/physrevb.38.2504

Cited by 166 publications

(58 citation statements)

References 10 publications

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“…A classical experimental study of the role of magnetic impurities in conventional superconductors was carried out 24 and followed by many in details. [25][26][27][28] Since the discovery of Bi-Sr-Ca-Cu-O high-Tc superconducting system, [29][30][31] besides modifying the 'Tc', great progress has been achieved in changing the structural properties of Bi-based superconductor by varying composition and processing condition (temperature, pressure, environment etc.). Among the various techniques for structural/microstructural modification even the phase control also, substitution/doping is believed to be the most promising.…”

Section: Introductionmentioning

confidence: 99%

Surface morphology and physical properties of partially melt textured Mn doped Bi-2223

et al. 2011

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The samples of Bi2Sr2Ca2Cu3-xMnxO10+δ (x = 0.0 to 0.30) were prepared by the standard solid-state reaction method. The phase identification characteristics of synthesized (HTSC) materials were explored through powder X-ray diffractometer reveals that all the samples crystallize in orthorhombic structure with lattice parameters a = 5.4053 Å, b = 5.4110 Å and c = 37.0642 Å up to Mn concentration of x = 0.30. The critical temperature (Tc) measured by standard four probe method has been found to depress from 108 K to 70 K as Mn content (x) increases from 0.00 to 0.30. The effects of sintering temperature on the surface morphology of Bi2Sr2Ca2Cu3-xMnxO10+δ have also been investigated. The surface morphology investigated through scanning electron microscope and atomic force microscopy (SEM & AFM) results that voids are decreasing but grains size increases as the Mn concentration increases besides, nanosphere like structures on the surface of the Mn doped Bi2Sr2Ca2Cu3-xMnxO10+δ (Bi-2223) samples.

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Section: Introductionmentioning

confidence: 99%

Surface morphology and physical properties of partially melt textured Mn doped Bi-2223

et al. 2011

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“…Since the discovery of the 110 K superconducting phase Bi2Sr2Ca2Cu30y (Bi-2223) in 1988 [1,2], a great deal of research has been focused on optimization of its phase purity and microstructure . Lead addition to the Bi-Sr-Ca-Cu-0 system was shown to stabilize the Bi-2223 phase and also accelerate the phase formation kinetics [7-91. Other related studies revealed that the lead content is a critical variable in fabricating tapes by the two-powder process [10,11].…”

Section: Introductionmentioning

confidence: 99%

Effect of lead content on phase evolution and microstructural development in Ag-clad Bi-2223 composite conductors

Merchant¹,

Maroni²,

Fischer³

et al. 1997

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A two powder process was used to prepare silver-sheathed monofilamentary Bil.8Pb~Srl.98Cal.97Cu3.080~ (Bi-2223) tapes with varying lead contents, x, from 0.2 to 0.5. The resulting tapes were subjected to thermomechanical processing and then characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive x-ray analysis (EDX). Layered phase texture was accessed using image analysis software on scanned SEM micrographs. Transport currents were measured at 77 K and zero field by the four-probe method. It was found that tapes with low lead content (x=0.2 and 0.25) showed incomplete conversion to Bi-2223, had small grain size and poor c-axis texture. Tapes having higher lead content (x=0.4 and 0.5) also showed incomplete conversion and the presence of lead-rich secondary phases. Tapes with lead content x=0.3 and 0.35 showed complete conversion to Bi-2223, and had the least amount of secondary phases, the best c-axis texture, and the highest transport currents (Jc). The carbon content of the precursor powder also had a strong influence on secondary-phase chemistry.

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“…It has been found that the needle-like grains are the low T c phase (2201) , and the platelike structures are the high T c phases (89)(90)(91). After the BC treatment , part of this surface was changed , but some plate- (a) before and (b) after exposure in the ball istic compressor.…”

Section: Sem Investiqationsmentioning

confidence: 99%

“…These revealed a new class 。 f materials to be explored. In the 75 years following the discovery of superconductivity , the transition temperature T c had been gradually increased from the 4.2 K for Hg to 23 (15) announced that a ceramic oxide compound in the Y-Ba-Cu-O system becomes a superconductor at a temperature as high as 90 K (called high temperature superconductor , HTSC). In about 12…”

Section: ) Heavy Fermion Superconductors Such As Ube I3 Etc T C mentioning

confidence: 99%

The Effects of Rapid Heating and Cooling on the Composition, Structure, and Superconducting Properties of Bi-Sr-Ca-Cu-O Compounds

Duan¹

2000

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Origin of the 110-K superconducting transition in the Bi-Sr-Ca-Cu-O system

Cited by 166 publications

References 10 publications

Surface morphology and physical properties of partially melt textured Mn doped Bi-2223

Surface morphology and physical properties of partially melt textured Mn doped Bi-2223

Effect of lead content on phase evolution and microstructural development in Ag-clad Bi-2223 composite conductors

The Effects of Rapid Heating and Cooling on the Composition, Structure, and Superconducting Properties of Bi-Sr-Ca-Cu-O Compounds

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