YBACUO INPUT COILS WITH LOW TC AND HIGH-TC SQUIDS

被引：11

作者：

OH, B ^{[1
]}

KOCH, RH ^{[1
]}

GALLAGHER, WJ ^{[1
]}

FOGLIETTI, V ^{[1
]}

KOREN, G ^{[1
]}

GUPTA, A ^{[1
]}

LEE, WY ^{[1
]}

机构：

[1] IBM CORP,DIV RES,ALMADEN RES CTR,SAN JOSE,CA 95120

来源：

APPLIED PHYSICS LETTERS | 1990年 / 56卷 / 25期

关键词：

D O I：

10.1063/1.102846

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have efficiently coupled single-level YBaCuO (YBCO) input coils to superconducting quantum interference devices (SQUIDs) using coils and SQUIDs made on separate substrates and sandwiched together. At 4.2 K, the coupling efficiency α to a low noise Nb-based SQUID was ∼0.76, with no increase in flux noise. At 77 K, the coupling efficiency of a YBCO coil to a TlBaCaCuO SQUID was ∼0.81. The magnetic field sensitivity of the coupled high T c SQUID at 77 K was 9 pT/√Hz at 1000 Hz, a five times improvement compared to the bare SQUID.

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页码：2575 / 2577

页数：3

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