TEMPERATURE-DEPENDENCE OF THE CRITICAL CURRENT IN YBA2CU3O7-DELTA AND BI2SR2CA1CU2O8 JOSEPHSON-JUNCTIONS

被引：16

作者：

AMINOV, BA

BRANDT, NB

THUY, NM

PONOMAREV, YG

SUDAKOVA, MV

KAUL, AR

GRABOI, IE

TRETIAKOV, YD

WITTIG, J

KOBELEVA, SP

FISHER, LM

ROSTA, L

机构：

[1] MV LOMONOSOV STATE UNIV, DEPT CHEM, MOSCOW 119899, USSR

[2] FORSCHUNGSZENTRUM JULICH, INST FESTKORPERFORSCH, D-5170 JULICH 1, FED REP GER

[3] NATL ELECTROTECH INST, KAZARMENNAYA 12, USSR

[4] HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST, HUNGARY

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1989年 / 160卷 / 5-6期

关键词：

Ceramic Materials - Superconducting Devices--Josephson Junctions - Yttrium Compounds--Thermal Effects;

D O I：

10.1016/0921-4534(89)90427-9

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have studied the stationary Josephson effect on YBa2Cu3O7-δ (Tc=90 K) and Bi2Sr2Ca1Cu2O8 (Tc=80 K and 87 K for two samples of different origin) ceramic based junctions. The temperature dependence of the critical current near Tc has been found as Ic approximately (Tc-T)3/2 for the Y-Ba-Cu-O samples indicating that they should be classified as S-N-I-N-S type junctions. The I-V curves of the Bi-Sr-Ca-Cu samples show the typical behaviour of S-I-S structures. Using Ambegaokar-Baratoff's theory for Bi2Sr2Ca1Cu2O8, the temperature dependence of the superconducting state gap Δ(T) was calculated and it was evaluated that 1.45&le2Δ(0)/kBTc&le3.5.

引用

页码：505 / 510

页数：6

共 18 条

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