Theoretical model of superconducting spintronic SIsFS devices
Motivated by recent progress in the development of cryogenic memory compatible with single flux quantum (SFQ) circuits, we have performed a theoretical study of magnetic SIsFS Josephson junctions, where “S” is a bulk superconductor, “s” is a thin superconducting film, “F” is a metallic ferromagnet, and “I” is an insulator. We calculate the Josephson current as a function of s and F layers thickness, temperature, and exchange energy of F film. We outline several modes of operation of these junctions and demonstrate their unique ability to have large product of a critical current IC and a normal-state resistance RN in the π state, comparable to that in superconductor–insulator–superconductor tunnel junctions commonly used in SFQ circuits. We develop a model describing switching of the Josephson critical current in these devices by external magnetic field. The results are in good agreement with the experimental data for Nb-Al/AlOx-Nb-Pd0.99Fe0.01-Nb junctions.
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AIP Publishing
17 publications, 26.15%
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6 publications, 9.23%
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3 publications, 4.62%
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MDPI
3 publications, 4.62%
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Elsevier
1 publication, 1.54%
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Wiley
1 publication, 1.54%
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Uspekhi Fizicheskikh Nauk Journal
1 publication, 1.54%
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- We do not take into account publications without a DOI.
- Statistics recalculated weekly.