MAGNETIC NOISE NEAR THE SUPERCONDUCTING TRANSITION IN BULK AND THICK-FILM YBCO

被引：5

作者：

FOULDS, SA ^{[1
]}

HARROP, SP ^{[1
]}

MUIRHEAD, CM ^{[1
]}

GOUGH, CE ^{[1
]}

ALFORD, NM ^{[1
]}

BUTTON, TW ^{[1
]}

机构：

[1] ICI PLC,ADV MAT,RUNCORN WA7 4QE,ENGLAND

来源：

PHYSICA C | 1991年 / 185卷

关键词：

D O I：

10.1016/0921-4534(91)91036-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have used a conventional low noise dc SQUID to measure the magnetic noise in a bulk YBCO ring and a thick film YBCO tube over the temperature range 4-100K and in very low magnetic fields. We observe noise levels which are higher than those found by other workers using epitaxial thin films. The noise in the bulk sample close to the transition exhibits two very closely spaced peaks and a spectral density which differs substantially from 1/f(n). By cutting a thin slit in the sample, we have identified one of the peaks with the onset of connectivity around the sample.

引用

页码：1821 / 1822

页数：2

共 6 条

[1] RESISTANCE NOISE AT THE SUPERCONDUCTING TRANSITION IN THICK-FILMS OF YBA2CU3O7-DELTA [J].