SQUID magnetometer based on Grooved Dayem nanobridges and a flux transformer

Edoardo Trabaldo; Christoph Pfeiffer; Eric Andersson; Riccardo Arpaia; Alexei Kalaboukhov; Dag Winkler; Floriana Lombardi; Thilo Bauch

doi:10.1109/TASC.2020.3004896

SQUID magnetometer based on Grooved Dayem nanobridges and a flux transformer

Superconductivity 2023-07-19 v1

Authors: Edoardo Trabaldo , Christoph Pfeiffer , Eric Andersson , Riccardo Arpaia , Alexei Kalaboukhov , Dag Winkler , Floriana Lombardi , Thilo Bauch

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Abstract

We report noise measurements performed on a SQUID magnetometer implementing Grooved Dayem nanobridge of YBCO as weak-links. The SQUID shows magnetic flux noise as low as 10 $\mu \Phi_0$ /Hz $^{0.5}$ . The magnetometer is realized by coupling the SQUID to a flux transformer with a two-level coupling scheme using a flip-chip approach. This improves the effective area of the SQUID and result in a magnetic field noise of 50 fT/Hz $^{0.5}$ at T=77 K.

Keywords

SQUID magnetometer grooved Dayem nanobridge YBCO weak-link flux transformer flip-chip magnetic flux noise field noise

Cite

@article{arxiv.1908.09875,
  title  = {SQUID magnetometer based on Grooved Dayem nanobridges and a flux transformer},
  author = {Edoardo Trabaldo and Christoph Pfeiffer and Eric Andersson and Riccardo Arpaia and Alexei Kalaboukhov and Dag Winkler and Floriana Lombardi and Thilo Bauch},
  journal= {arXiv preprint arXiv:1908.09875},
  year   = {2023}
}

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4 pages, 4 figures

SQUID magnetometer based on Grooved Dayem nanobridges and a flux transformer

Abstract

Keywords

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