STUDY OF UPPER CRITICAL-FIELD HC2(T) IN DOPED BI-SR-CA-CU-O SUPERCONDUCTORS WITH 100-K PHASE

被引：5
|
作者：
HAN, SH
HEGEDUS, Z
ANDERSSON, M
NYGREN, M
RAPP, O
YAN, YF
CHEN, Q
WEI, YN
HE, YS
机构：
[1] UNIV STOCKHOLM,ARRHENIUS LAB,DEPT INORGAN CHEM,S-10691 STOCKHOLM,SWEDEN
[2] CHINESE ACAD SCI,INST PHYS,BEIJING 10080,PEOPLES R CHINA
[3] QUINGHUA UNIV,DEPT SOLID STATE PHYS,BEIJING,PEOPLES R CHINA
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1990年 / 169卷 / 3-4期
关键词：
D O I：
10.1016/0921-4534(90)90182-E
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Hc2(T) has been studied in four Bi-(Pb)-Sr-Ca-Cu-O superconductors with the 110 K type of structure under magnetic fields up to 12 T. It is found that the curvature of the critical field close to Tc is strongly sample dependent. By a number of measurements which characterize the samples, such as X-ray diffraction, SEM analysis, chemical analysis, AC susceptibility and normal state and superconducting resistive properties, we find that the curvature of Hc2(T) can be empirically correlated with the purity of the samples. It is suggested that the intrinsic behavior of the high-Tc Bi-based polycrystalline superconductors is a linear critical fiels curve close to Tc. © 1990.
引用
收藏
页码：250 / 256
页数：7
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