ENHANCEMENT OF THE SUPERCONDUCTING TRANSITION-TEMPERATURE OF TLSR2CACU2O7 BY YTTRIUM AND VANADIUM SUBSTITUTIONS

Journal article

Superconductivity at 105 K has recently been observed in a family of compounds (Tl1-xMx)Sr2(Ca1-yYy)Cu2O7-δ (M = Ti, Zr, Hf, V, Nb, and Ta). An interesting feature is the enhancement of Tc in the parent TlSr2CaCu2O7 compound via substitution of high-valent 3d transition metals; this is in contrast to other high-Tc cuprates investigated so far. The effects on crystal structure and electronic properties of yttrium and vanadium doping in the metallic, but not superconducting, TlSr2CaCu2O7 compound are described. The new high-Tc superconductor, (Tl0.5V0.5)Sr2(Ca0.8Y0.2)Cu2O7-δ, exhibits a current density of 1.5 × 107 A/cm2 at 5 K and 1 T for the sintered material which is comparable to that observed in YBa2Cu3O7-δ and YBa2Cu4O8. © 1991.

Authors: Liu, R; Edwards, P

• Publication status: Published
• Journal: JOURNAL OF SOLID STATE CHEMISTRY
• Volume: 91
• Issue: 2
• Pages: 407-412
• Publication date: 1991-04-01
• DOI: 10.1016/0022-4596(91)90099-4
• EISSN: 1095-726X
• ISSN: 0022-4596
• Language: English