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

Abstract

Superconducting critical transitions with an onset at 112 K and zero resistance at 107 K are obtained within the Bi-Sr-Ca-Cu-0 system. The synthesis and formation of the 110-K superconducting phase using the 85-K material as a precursor is explained. The 110-K phase grows from the 85-K phase such that the resulting faceted crystal (a pseudomorph)

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

“…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.…”

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

“…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].…”

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

“…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.…”

“…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…”