THERMOELECTRIC-POWER OF TL-CA-BA-CU-O AND PR-TL-SR-CA-CU-O HIGH-TC SUPERCONDUCTORS

被引：23

作者：

BHATNAGAR, AK

PAN, R

NAUGLE, DG

SQUATTRITO, PJ

CLEARFIELD, A

SHENG, ZZ

SHAMS, QA

HERMANN, AM

机构：

[1] TEXAS A&M UNIV SYST,DEPT CHEM,COLLEGE STN,TX 77843

[2] TEXAS A&M UNIV SYST,DEPT PHYS,COLLEGE STN,TX 77843

[3] UNIV ARKANSAS,DEPT PHYS,FAYETTEVILLE,AR 72701

来源：

SOLID STATE COMMUNICATIONS | 1990年 / 73卷 / 01期

关键词：

D O I：

10.1016/0038-1098(90)90014-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The resistance and the thermoelectric power of thallium based high Tc superconductors Tl-Ca-Ba-Cu-O and Pr-Tl-Sr-Ca-Cu-O have been measured in the temperature interval 77-300 K. The resistive behaviour of Tl-Ca-Ba-Cu-O is found to be metallic while that of Pr-Tl-Sr-Ca- Cu-O shows a mixed metallic and semiconductive behaviour. The thermoelectric power of both superconductors is positive throughout the temperature interval. The thermoelectric power of the Tl-Ca-Ba- Cu-O superconductor decreases linearly with increasing temperature above the superconducting transition temperature, Tc, below which it is zero. The thermoelectric power of the Pr-Tl-Sr-Ca-Cu-O sample shows a maximum near 180 K. The temperature dependence of the thermoelectric power of these samples, above Tc, is quite different than that observed for RBa2Cu3O7-x superconductors. © 1990.

引用

页码：53 / 57

页数：5

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