Micromagnetic simulation of the magnetization-controlled critical current in a S–(S/F)–S superconducting switch

Kammermeier, Lukas; Scheer, Elke

Micromagnetic simulation of the magnetization-controlled critical current in a S–(S/F)–S superconducting switch

Dateien

Kammermeier_2-sd6mlur81rv82.pdfGröße: 1.19 MBDownloads: 16

Datum

2024

Angaben zur Forschungsförderung

Deutsche Forschungsgemeinschaft (DFG): 317077841

Open Access-Veröffentlichung

Open Access Hybrid

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Applied Physics Letters. AIP Publishing. 2024, 125(5), 052602. ISSN 0003-6951. eISSN 1077-3118. Verfügbar unter: doi: 10.1063/5.0215717

Zusammenfassung

In this Letter, we provide three dimensional micromagnetic simulations describing the nonvolatile magnetization control of the critical current of a superconductor–proximity-modified superconductor–superconductor junction by initializing and training its magnetization state in an external magnetic field, the experimental demonstration of which had been reported earlier. In the present work, we develop a microscopic explanation for the observed general behavior of the reduced critical current Ic in states of high magnetization M. We are able to reproduce the non-monotonous behavior of Ic(M) and can clearly correlate the discrete jumps in Ic(M) with flips of single or few magnetic domains in granular cobalt. We show that both the three-dimensional modeling and the grain size distribution are important to replicate the experimental observations.

Fachgebiet (DDC)

530 Physik

Schlagwörter

Heisenberg exchange interaction, Nanomagnets, Ferromagnetic materials, Josephson effect, Magnetic ordering, Superconductivity, Supercurrent, Computer simulation, Energy minimization, Magnetic nanostructures

Zitieren

ISO 690

KAMMERMEIER, Lukas, Elke SCHEER, 2024. Micromagnetic simulation of the magnetization-controlled critical current in a S–(S/F)–S superconducting switch. In: Applied Physics Letters. AIP Publishing. 2024, 125(5), 052602. ISSN 0003-6951. eISSN 1077-3118. Verfügbar unter: doi: 10.1063/5.0215717

BibTex

@article{Kammermeier2024-07-29Micro-70621,
  year={2024},
  doi={10.1063/5.0215717},
  title={Micromagnetic simulation of the magnetization-controlled critical current in a S–(S/F)–S superconducting switch},
  number={5},
  volume={125},
  issn={0003-6951},
  journal={Applied Physics Letters},
  author={Kammermeier, Lukas and Scheer, Elke},
  note={Article Number: 052602}
}

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Universitätsbibliographie

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Begutachtet

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