FLUX NOISE FROM SUPERCONDUCTING YBA2CU3O7-X FLUX TRANSFORMERS

被引：58

作者：

FERRARI, MJ ^{[1
]}

KINGSTON, JJ ^{[1
]}

WELLSTOOD, FC ^{[1
]}

CLARKE, J ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV MAT SCI,BERKELEY,CA 94720

来源：

APPLIED PHYSICS LETTERS | 1991年 / 58卷 / 10期

关键词：

D O I：

10.1063/1.104386

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Using a dc superconducting quantum interference device (SQUID) at 4.2 K, we have measured the magnitude and temperature dependence of the flux noise generated by superconducting flux transformers made from YBa2Cu3O7-x. If the transformer loop is opened, the observed noise decreases by a factor of 10, demonstrating that moving vortices generate noise primarily by altering the screening current, rather than by coupling their magnetic flux directly into the SQUID. Model calculations are given for the various noise contributions, and shown to be reasonable predictions of the observed effects.

引用

页码：1106 / 1108

页数：3

共 9 条

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