ON THE LIMITING FACTORS OF THE CRITICAL CURRENT-DENSITY IN HIGH-TC SUPERCONDUCTING CERAMICS

被引：11

作者：

MIU, L

CRISAN, A

POPA, S

SANDU, V

NISTOR, L

机构：

[1] Institute of Physics and Technology of Materials, Bucharest

来源：

JOURNAL OF SUPERCONDUCTIVITY | 1990年 / 3卷 / 04期

关键词：

HIGH-TC SUPERCONDUCTING CERAMICS; CRITICAL CURRENT DENSITY; JOSEPHSON VORTICES; PINNING;

D O I：

10.1007/BF00617464

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The temperature dependence of the critical current density at high temperatures and in weak applied magnetic field for YBa2Cu3O7-y ceramic samples with a pronounced granular character is analyzed. The experimental results can be explained in terms of thermally activated motion of the intergrain Josephson vortices at grain boundaries, which may be an indication that the actual limiting factor for the critical current density in ceramic samples results from a weak pinning force density for the intergrain vortices rather than from the weak-link quenching.

引用

页码：391 / 394

页数：4

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