THERMOPOWER AND RESISTIVITY MEASUREMENTS ON OXYGEN-ANNEALED HGBA2CACU2O6+DELTA

被引：28

作者：

REN, YT ^{[1
]}

CLAYHOLD, J ^{[1
]}

CHEN, F ^{[1
]}

HUANG, ZJ ^{[1
]}

QIU, XD ^{[1
]}

SUN, YY ^{[1
]}

MENG, RL ^{[1
]}

XUE, YY ^{[1
]}

CHU, CW ^{[1
]}

机构：

[1] UNIV HOUSTON,TEXAS CTR SUPERCONDUCTIV,HOUSTON,TX 77204

来源：

PHYSICA C | 1993年 / 217卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(93)90787-Q

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have measured the thermoelectric power and resistivity of the 120 K superconductor HgBa2CaCu2O6+delta (Hg-1212) as a function of temperature and oxygen annealing. Before annealing the Seebeck coefficient is moderate and positive, suggesting that the as-grown compound is slightly under-doped. After annealing in oxygen at 200-degrees-C for 10 h, T(c) was enhanced by 5 K. Further annealing increased T(c) by an additional 1 K and sharpened the transition. The thermopower shifts downward with increasing doping by oxygen annealing, resembling that of the Bi-based and Tl-based systems. The carrier concentration was estimated from thermopower data and the T(c) value as approximately 0.13 and approximately 0.14 per Cu before and after oxygen annealing, respectively.

引用

页码：6 / 10

页数：5

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