Magnetization control of the critical current in a S-(S/F)-S superconducting switch

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2024
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Applied Physics Letters. AIP Publishing. 2024, 124(16), 162605. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/5.0202571
Zusammenfassung

We show the control of the critical current Ic of a superconductor–superconductor/ferromagnet–superconductor [S-(S/F)-S] type switch by the magnetization state of the F. The inverse proximity effect of a S/F bilayer is used to define the weak link and hence the maximum critical current of the junction. The magnetization of the F lead is set by an external magnetic field. We show that the critical current in zero field depends on the remanent magnetization state via stray-field effects and thereby allows for a post-manufacturing control of the junction's properties, in particular the tunability between a maximal critical current and a full suppression of Ic without applying a persistent magnetic field. We propose a simplified model based on the relative orientation of magnetic domains that explains our findings qualitatively.

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530 Physik
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Exchange interactions, Ferromagnetic materials, Magnetic ordering, Phase transitions, Superconductivity, Supercurrent, Proximity effects, Logic elements, Data storage device, Interfaces
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ISO 690KAMMERMEIER, Lukas, Elke SCHEER, 2024. Magnetization control of the critical current in a S-(S/F)-S superconducting switch. In: Applied Physics Letters. AIP Publishing. 2024, 124(16), 162605. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/5.0202571
BibTex
@article{Kammermeier2024-04-19Magne-69913,
  year={2024},
  doi={10.1063/5.0202571},
  title={Magnetization control of the critical current in a S-(S/F)-S superconducting switch},
  number={16},
  volume={124},
  issn={0003-6951},
  journal={Applied Physics Letters},
  author={Kammermeier, Lukas and Scheer, Elke},
  note={Article Number: 162605}
}
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