Magnetic and superconducting properties of Tl(Sr1.5R0.5)CaCu2O7-δ compounds

被引：19

作者：

Lee, WH ^{[1
]}

Yeh, MR ^{[1
]}

Sung, LR ^{[1
]}

机构：

[1] Natl Chung Cheng Univ, Dept Phys, Chia Yi 621, Taiwan

来源：

PHYSICA C | 1999年 / 311卷 / 3-4期

关键词：

superconductivity; substitution effects; local moment; Tl(Sr1.5R0.5)CaCu2O7-delta;

D O I：

10.1016/S0921-4534(98)00614-5

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

DC magnetic susceptibility and resistivity measurements have been performed on 14 Tl(Sr1.5R0.5)CaCu2O7-delta compounds with R = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu. All samples except the Ce-doped compound show superconducting phase transition temperature around 80-90 K. The rare-earth atoms behave as local moments above the superconducting transition temperature of these compounds. Mechanism of filling of holes in the CuO2 plane can be employed to interpret the suppression or enhancement of superconductivity by rare-earth ions in Tl(Sr1.5R0.5)CaCu2O7-delta. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：297 / 302

页数：6

共 21 条

[1] HOLE DOPING IN TL2BA2CUO6+DELTA (TC=0-80 K) INVESTIGATED BY TI-205 NUCLEAR-MAGNETIC-RESONANCE [J].