Noise properties of (Hg,Re)-1212 dc SQUIDs

被引：2
|
作者：
Tsukamoto, A [1 ]
Inoue, N
Sugano, T
Adachi, S
Tanabe, K
Takagi, K
机构：
[1] Hitachi Ltd, Adv Res Lab, Kokubunji, Tokyo 1858601, Japan
[2] ISTEC, Superconduct Res Lab, Koto Ku, Tokyo 1350062, Japan
来源：
PHYSICA C | 2001年 / 357卷 / SUPPL. 1期
关键词：
SQUID; flux noise; Hg0.9Re0.1Ba2CaCu2Oy;
D O I：
10.1016/S0921-4534(01)00585-8
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have fabricated Hg0.9Re0.1Ba2CaCu2Oy ((Hg,Re)-1212) dc superconducting quantum interference devices (SQUIDs) using grain boundary junctions on SrTiO3 bicrystal substrates and evaluated their flux noise. The large 1/f noise observed in a dc bias scheme was dramatically decreased by using an ac bias scheme, and the white flux noise below 20 mu Phi (0)/Hz(1/2) was obtained. This noise is comparable to that for SQUIDs made from high-quality YBa2Cu3Oy thin films. However, some devices showed a substantial residual low-frequency noise, indicating the contribution of the noise from vortices motion in the superconducting films and/or junctions. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：1459 / 1461
页数：3
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