Low‐frequency noise in dc superconducting quantum interference devices below 1 K
Low‐frequency noise in dc superconducting quantum interference devices below 1 K
复制标题
DOI：
10.1063/1.98041
复制
发表时间：
1987-03
影响因子：
4
通讯作者：
F. Wellstood;C. Urbina;J. Clarke
中科院分区：
文献类型：
--
作者：
F. Wellstood;C. Urbina;J. Clarke
在低于1 K的温度下，一系列直流超导量子干涉仪（SQUID）表现出明显的磁通噪声，其谱密度标度为1/f α，其中0.58<α<0.80。通常情况下，噪声的幅度随着温度降低到1 K以下而增加，在低温下趋于平缓，在1 Hz时的值为7±3 μΦ 0 Hz −1/2，几乎与SQUID的参数和材料无关。虽然大量假设的噪声源已被排除，但其来源仍然不明。
At temperatures below about 1 K, a series of dc superconducting quantum interference devices (SQUID’s) exhibited an apparent flux noise with a spectral density scaling as 1/f α, where 0.58<α<0.80. Typically, the magnitude of the noise increased as the temperature was lowered below 1 K, tending to flatten out at low temperatures with a value of 7±3 μΦ0Hz−1/2 at 1 Hz that was nearly independent of the parameters and materials of the SQUID’s. Although a large number of hypothetical sources of the noise have been eliminated, the origin remains unidentified.