Flux trapping in multi-loop SQUIDs and its impact on SQUID-based absolute magnetometry
Flux trapping in multi-loop SQUIDs and its impact on SQUID-based absolute magnetometry
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DOI：
10.1088/1361-6668/aaa44f
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发表时间：
2018-01
影响因子：
3.6
通讯作者：
T. Schönau;V. Zakosarenko;M. Schmelz;S. Anders;H. Meyer;R. Stolz
中科院分区：
文献类型：
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作者：
T. Schönau;V. Zakosarenko;M. Schmelz;S. Anders;H. Meyer;R. Stolz
采用重复降温循环的方法，研究了磁通捕获对多回路SQUID磁强计的磁通电压特性的影响。对于具有N个平行环的鱿鱼，即使在零磁场下，也可以观察到N个不同的磁通偏移量，每个磁通偏移量由Φ0/N分隔。这些通量偏移量进一步分裂成所谓的精细结构，这可以用鱿鱼设计中的微小不对称来解释。特别讨论了观测结果对以前提出的绝对式SQUID级联矢量磁力仪的影响。
The effect of flux trapping on the flux-voltage characteristics of multi-loop SQUID magnetometers was investigated by means of repeated cool-down cycles in a stepwise increased magnetic background field. For a SQUID with N parallel loops, N different flux offsets, each separated by Φ 0 / N , were observed even in zero magnetic field. These flux offsets further split into a so called fine structure, which can be explained by minor asymmetries in the SQUID design. The observed results are discussed with particular regard to their impact on the previously presented absolute SQUID cascade vector magnetometer.