The effect of Au diffusion on some physical properties of Bi1.8Pb0.35Sr1.9Ca2.1Cu3Oy superconductors

Some physical properties and Vickers hardness measurements of Fe diffusion-doped Bi1.8Pb0.35Sr1.9Ca2.1Cu3Oy superconductors

“…Among the metals Au and Ag have been found to be nonpoisoning to YBCO [9], while Ag has been found to be the only metal element that is non-poisoning to the BSCCO system [10]. In our previous works, the role of diffusion annealing time and temperature on the superconducting, structural and mechanical properties of Au diffusion-doped Bi-2223 superconductors were investigated [11][12][13][14][15]. These works indicated that gold doping enhance the superconducting and the mechanical properties of the samples.…”

Effect of MgB2 additives on structure, electrical and thermal properties of Eu1Ba2Cu3O7

“…The dopants and defects act as pinning centers, thus, preventing flux movement and increasing the critical current which results in a decrease in critical temperature [10][11][12][13][14]. On the other hand, some studies show that addition of certain materials can enhance the flux pinning behavior and the superconducting transition temperature T c of REBCO [15]. Increasing of T c depends on chemical composition, crystallite size, alignment of grains, etc.…”

Improvement in high-Tc phase formation in (thallium–antimony) doped bismuth-based superconducting materials

“…It can be regarded as a model system for investigation of the appearance of the superconducting state by doping with different elements. A lot of interest is focused on the Bi(2223) phase and substitution of several cations, such as Pb +2 , Sb +3 , Mg +2 , Nb +3 , Ga +3 , Mo +3 Au +3 and V +5 , Pb +2 Sb +3 , Pb +2 Sn +4 and Nd +3 Tb +3 at different sites has already been investigated [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

“…Addition of antimony is reported to exert a stabilizing influence on the formation of the 2223 phase [4] and believed to play an important role in enhancing the kinetics of especially the decarbonation reaction, as well as the promotion of the high-Tc phase [5]. Increasing annealing time from 10 to 50 h (at 1103 K) of Au-doped Bi(2223) system results in increase in the values of the critical transition temperature, Tc (0) (from 100 to 106 K) and the transport critical current density [6,7]. On the contrary, the addition of Nb, Ga and Mo results in lowering the zero resistivity critical temperature, Tc (0) of the material [8][9][10].…”