Effects of modulation schemes on the performance of directly coupled high-Tc dc SQUID magnetometers

Jau Han Chen*, Kuen Lin Chen, Hsiao Wen Yu, Ming Jye Chen, Chiu Hsien Wu, Jen Tzong Jeng, Herng Er Horng, Hong Chang Yang


研究成果: 雜誌貢獻會議論文同行評審

4 引文 斯高帕斯(Scopus)


We have designed and fabricated the directly coupled YBa2Cu3O7-δ dc SQUID magnetometers with two different modulation schemes to study the crosstalk effect in the on-chip multi-channel magnetometers. In one of the modulation schemes, the modulation current was directly injected into the SQUID body and the pick-up coil. The modulation efficiency was changed by the ratio of the modulation current flowing through the SQUID to the pick-up coil. In the other schemes, the modulation flux is mutually coupled through an external coil, and the modulation efficiency was changed by the mutual inductance of the external coil and the magnetometer. The results show that the modulation efficiency was varied when the value of self-inductance or the mutual inductance of SQUIDs change. Usually, lower modulation efficiency results in a higher crosstalk. The performance of magnetometers was also influenced by different modulation schemes. Their noise spectrum was compared as evidence.

頁(從 - 到)1110-1113
期刊IEEE Transactions on Applied Superconductivity
發行號1 I
出版狀態已發佈 - 2001 三月
事件2000 Applied Superconductivity Conference - Virginia Beach, VA, 美国
持續時間: 2000 九月 172000 九月 22

ASJC Scopus subject areas

  • 電子、光磁材料
  • 凝聚態物理學
  • 電氣與電子工程


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