TLCABASRCU2O7-DELTA, A NEW 94-K SUPERCONDUCTOR

被引：21
作者：
GOPALAKRISHNAN, IK
YAKHMI, JV
IYER, RM
机构：
[1] Chemistry Division, Bhabha Atomic Research Centre, Bombay
来源：
PHYSICA C | 1991年 / 172卷 / 5-6期
关键词：
CU-O SYSTEM; BULK SUPERCONDUCTIVITY; 125-K SUPERCONDUCTOR; CRYSTAL-STRUCTURES; TEMPERATURE; TL2BA2CA2CU3O10; TL2BA2CACU2O8; SERIES;
D O I：
10.1016/0921-4534(91)90212-H
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report the synthesis of a new high-T(c) superconductor TlCaBaSrCu2O7-delta in single-phase form. Air-quenched samples showed a T(c) (R = 0) of 90 K. Slow cooling the compound in nitrogen environment improves T(c) (R = 0) value to 94 K. AC susceptibility measurements confirm a sharp drop with an onset at 94 K. Contraction of the unit cell, consequent upon Sr-substitution in Tl-1122 structure, as observed by X-ray diffraction analysis confirms the occupancy of Sr-ions at Ba-sites.
引用
收藏
页码：450 / 454
页数：5
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