Growth and properties of crystals of Tl-Ba-Ca-Cu-O system

被引：0
|
作者：
孟宪仁
彭志强
涂清云
林明柱
林振金
桑丽华
刘振兴
机构：
[1] Beijing Normal University
[2] Beijing 100875
[3] Institute of Physics
[4] Chinese Academy of Sciences
[5] China
[6] Beijing 100080
[7] Department of Physics
来源：
Science China Mathematics | 1995年 / 10期
关键词：
high temperature superconductor; crystal growth; Tl-Ba-Ca-Cu-O system; AC susceptibility; reflectance spectrum;
D O I：
暂无
中图分类号：
O782 [晶体生长工艺];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Crystals of Tl-2223 and Tl-2212 have been successfully grown by self-flux method. The typical dimension in 1.0×1.0×0.1 mm3, and crystals as big as 2.0×2.0×0.3mm3 were also obtained. The transition temperature of crystals of Tl-2212 and Tl-2223 were 110 and 119K, respectively. Detailed studies on the effect of the cooling rate as well as Tl content were conducted. The results of X-ray diffraction experiments, SEM and EDX are also presented. AC susceptibility measurements were carried out on a Tl-2212 single crystal under various external magnetic fields applied normal to a-b plane. Measurements of reflectance spectra were also applied to a single crystal of Tl-2223 to investigate the optical anisotropy of Tl-2223.
引用
收藏
页码：1232 / 1238
页数：7
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