Directly coupled superconducting quantum interference device magnetometer fabricated in magnesium diboride by focused ion beam

被引：34

作者：

Burnell, G

Kang, DJ

Ansell, DA

Lee, HN

Moon, SH

Tarte, EJ

Blamire, MG

机构：

[1] Univ Cambridge, Dept Mat Sci, Cambridge CB2 3QZ, England

[2] Univ Cambridge, IRC Superconduct, Cambridge CB2 3QZ, England

[3] LG Elect Inst technol, Seoul 137724, South Korea

来源：

APPLIED PHYSICS LETTERS | 2002年 / 81卷 / 01期

关键词：

D O I：

10.1063/1.1491599

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the fabrication of a directly coupled superconducting quantum interference device (SQUID) magnetometer in MgB2 using a focused ion beam to create Josephson junctions in a 70-nm-thick-film of MgB2. The SQUID shows a voltage modulation (DeltaV) of 175 muV at a temperature of 10 K and operates over a temperature range from 10 to 24 K. We find excellent agreement between the measured maximum transfer functions and those predicted by theory. We have measured the magnetic flux white noise level at 20 K and 10 kHz to be as low as 14 muPhi(0) Hz(-1/2). (C) 2002 American Institute of Physics.

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页码：102 / 104

页数：3

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