DIFFUSION OF AG IN BI(PB)-SR-CA-CU-O SUPERCONDUCTORS

被引：18

作者：

DZHAFAROV, TD

COMERT, H

ALTUNBAS, M

ALVER, U

KUCUKOMEROGLU, T

KOPYA, AI

机构：

[1] Karadeniz Technical University, Faculty of Science and Arts, Department of Physics

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1995年 / 221卷

关键词：

SUPERCONDUCTORS; SILVER; DIFFUSION;

D O I：

10.1016/0925-8388(94)01472-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The Ag diffusion in the superconducting oxide ceramic Bi1.6Pb0.4Sr2Ba2Cu3Ox has been studied over the temperature range 350-800 degrees C using the technique of successive removal of thin layers and measurement of the sample resistivity. The temperature dependence of the Ag diffusion coefficient is given by the relation D = 5.2 x 10(-3) exp(-0.70/kT). The observed fast Ag diffusion is assigned to impurity migration through the defects of ceramic samples (the surface of pores, grain boundaries etc.). The current-voltage characteristics of Ag-Bi(Pb)-Sr-Ca-Cu-O-Ag structures at room temperature became markedly degraded. It is discussed in relation to the redistribution of Ag via diffusion (with D approximate to 10(-12) cm(2) s(-1)) from the metallic layer into the superconductor.

引用

页码：264 / 266

页数：3

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