Bulk superconductivity at 120 K in the Tl–Ca/Ba–Cu–O system

Preparation of nanoparticles of silver halides, superconductors and magnetic materials using water-in-oil microemulsions as nano-reactors

“…This led to the discovery of new superconducting materials in the Y-Ba-Cu-O system with T c above the boiling point of liquid nitrogen [125,126]. Recently, even higher T c (> 110 K) superconductors were discovered in the Bi-Sr-Ca-Cu-O [127] and T1-Ba-Ca-Cu-O [128] systems.…”

Excess conductivity analysis and infrared absorption spectroscopy of Mg-doped TlBa2Ca2Cu3O10-δ superconductor

“…Thallium based high-T c superconductor family was discovered in 1988 by Sheng and Hermann [1][2][3]. All of the Tl-based compounds can be described by the general formula Tl m A 2 Ca n-1 Cu n O 2n+m+2 where m = 1, 2; n = 1, 2, 3, 4, 5; A = Ba, Sr.…”

Subsolidus Phase Relations of the SrO-In2O3-CuO System in Air

“…After the discovery of superconducting compounds with high critical temperature (T c ) in the Tl-Ba-Ca-Cu-O system, [1] attempts have been made to replace thallium by harmless elements, in particular indium, which is located just above Tl in the periodic table. However, as reported by Hur et al [2] the solubility limit of In in the phase having the highest T c is limited to about 20 at.% and In actually results in partial suppression of the superconducting properties.…”