ChemInform Abstract: Anomalous Behavior of the Superconducting Transition Temperature and Width in the Tl—Ba—Ca—Cu—O System in Dependence on the Metal Oxides Concentration.

Abstract

Anomalous Behavior of the Superconducting Transition Temperature and Width in the Tl-Ba-Ca-Cu-O System in Dependence on the Metal Oxides Concentration. -Thallium containing cuprate ceramics of the general composition TlBa 2 Ca 2 Cu 3 O 9 alloyed with different amounts of metal oxides (MgO, Ta 2 O 5 , HfO 2 , V 2 O 5 , as well as MgO/BaF 2 ) are synthesized. The presence of BaF 2 allows the introduction of metal oxide without significant changes of the superconducting properties. Width and transition temp. vary in dependence on the concentration of the metal oxide. -(VOLKOV, V. E.; DANILOV, J. YU.; ZHAROVA, L. A.; KOVALEV, YU. G.; ZHIDKOV, L. L.; CHERNOV, V. K.; MATORIN, E. E.; BUZMAKOV, A. E.; VAKHTEL', A. K.; Zh.