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Polycrystalline (Tl0.5Pb0.5)(Sr0.9Ba0.1)2Ca2Cu3Oy superconducting thick films with high critical current densities

“…Additional information employing spray-pyrolysis [3,4] or aerosol deposition [5] and electro-chemical deposition [6,7] has been published. Difficulties with the preparation of high-purity Tl-1223 superconductors were overcome by partly substituting Tl by Pb and Sr by Ba [8][9][10][11][12].…”

Bismuth Valence in a Tl0.7Bi0.3Sr1.6Ba0.4CaCu2OySuperconductor from X-Ray Photoemission Spectroscopy

“…Polycrystalline pellets of the Tl,Bi-1212, Tl,Pb-1223 and Bi,Pb-2223 superconductors were prepared by solid--state reaction following a procedure described elsewhere [3][4][5]. The superconducting transition temperatures T c were 102.5 K, 118 K and 103 K, respectively.…”

“…The superconducting transition temperatures T c were 102.5 K, 118 K and 103 K, respectively. They were determined from the temperature dependences of dispersive and absorption part of ac susceptibility for Tl,Bi-1212 and of resistance for Tl,Pb-1223 and Bi,Pb--2223 with the overall accuracy ±0.1 K [3][4][5][6][7]. The oxygen stoichiometry of the Tl,Bi-1212 superconductor was y ≈ 7 [3].…”

A Search for a Low Anisotropic Superconductor

“…The researchers have adopted different synthesis routes to achieve a phase pure material. One way of improving the phase purity of Tl-1223 compound is the substitution of Pb and (or) Bi for Tl, and Sr for Ba in the starting composition [69,[72][73][74][75][76][77]. [83].…”

“…The use of high-pressure synthesis technique is also helpful in achieving single phase of Tl-1223 superconductors with out any cationic substitutions [87,88]. In addition Tl-1223 samples prepared under high pressure have shown increase in the critical temperature, transport J c , and high irreversibility field H irr , Figure 8 [77,89]. The application of pressure improves the intergranular coupling and facilitates charge transport process, which results in higher J c and H irr .…”