IRREVERSIBILITY LINE AND FLUX FLOW NOISE IN SUPERCONDUCTING NB-TA

被引：4

作者：

OTABE, ES ^{[1
]}

MATSUSHITA, T ^{[1
]}

MATSUNO, T ^{[1
]}

YAMAFUJI, K ^{[1
]}

机构：

[1] KYUSHU UNIV,DEPT ELECTR,FUKUOKA 812,JAPAN

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1991年 / 27卷 / 02期

关键词：

D O I：

10.1109/20.133354

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

It has been found that the critical current density, J(c), in high T(c) oxide superconductors is reduced to zero at high temperatures and/or high magnetic fields even in a superconducting region. The irreversibility line was investigated in weakly pinned superconducting Nb-Ta with low T(c) and was compared with that in oxide superconductors. Large flux flow noise with a peak around 0.3 Hz was observed in Nb-Ta specimens. The noise power integrated in the frequency range of 0.1-1.0 Hz had a sharp peak when it was plotted against the magnetic field. The mechanism of such a characteristic noise is argued.

引用

页码：1033 / 1036

页数：4

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