Title :
Effect of synthesis condition on superconducting transmission temperature in Tl-Ba-Ca-Cu-O system
Author :
Chunfang, Liu ; Lian, Zhou ; Zhaoling, Yang ; Wang Shugian ; Shejun, Du ; Jingren, Xiu ; Yongcai, Ye
Author_Institution :
Baoji Inst. for Non-ferrous Metal Res., Shaanxi, China
fDate :
3/1/1989 12:00:00 AM
Abstract :
The formation of the high-Tc superconducting phases in the Tl-Ba-Ca-Cu-O system has been investigated. Stable superconductivity up to 119 K was observed. One of the superconducting phases displays an onset temperature of 122 K. The resistance of the TlBaCaCu2Oy sample, which is almost single-phase, starts to drop sharply above 113 K and reaches zero at 108 K. The bulk samples with different compositions in the Tl-Ba-Ca-Cu-O system were synthesized. The electrical resistivity and AC magnetic susceptibility dependence on the temperature show that the zero-resistance transition temperature in most of the samples is above 96 K
Keywords :
barium compounds; calcium compounds; high-temperature superconductors; magnetic susceptibility; materials preparation; superconducting transition temperature; thallium compounds; 122 K; AC magnetic susceptibility; Tl-Ba-Ca-Cu-O; electrical resistivity; high temperature superconductor; preparation conditions; transmission temperature; Displays; Electric resistance; High temperature superconductors; Magnetic susceptibility; Powders; Solid state circuits; Superconducting transition temperature; Superconductivity; Temperature dependence; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
