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Cu1−xTlxBa2Ca3Cu4O12−y(Cu1−xTlx-1234) superconductor with Tc=126 K

Authors
Journal
Physica C Superconductivity
0921-4534
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/s0921-4534(97)00592-3
Disciplines
  • Physics

Abstract

Abstract The samples of Cu 1−xTl xBa 2Ca 3Cu 4O 12−y (x=0∼0.5) system with low Tl concentration were prepared by a high pressure techniques. The Cu 1−xTl xBa 2Ca 3Cu 4O 12−y (Cu 1−xTl x -1234: x=0.4∼0.5) samples show Tc of 126 K and superconducting anisotropy of γ=4. Their Tc values are higher than those of parent materials of CuBa 2Ca 3Cu 4O 12−y (Cu-1234) and TlBa 2Ca 3Cu 4O 11 (Tl-1234) by 8 K and 4 K, respectively. The anisotropy of Cu 1−xTl x-1234 system is close to the value (γ=3.5) of Tl-1234 and higher than that of Cu-1234 (γ=1.6.

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