Applied Physics Letters, volume 102, issue 19, pages 192603

Theoretical model of superconducting spintronic SIsFS devices

S V Bakurskiy ^{1, 2}

N V Klenov ^{1, 2}

I I Soloviev ¹

V V Bolginov ³

V. V. Ryazanov ³

I V Vernik ⁴

O A Mukhanov ⁴

M Yu Kupriyanov ¹

A. A. Golubov ⁵

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Lomonosov Moscow State University Skobeltsyn Institute of Nuclear Physics (MSU SINP) 1 , Leninskie gory, GSP-1, Moscow 119991, Russian Federation |

Faculty of Physics, Lomonosov Moscow State University 2 , 119992 Leninskie Gory, Moscow, Russian Federation |

Institute of Solid State Physics, Russian Academy of Sciences 3 , Chernogolovka 142432, Russian Federation |

⁴

HYPRES, Inc. 4 , 175 Clearbrook Rd., Elmsford, New York 10523, USA |

⁵

Faculty of Science and Technology and MESA+Institute for Nanotechnology 5 , University of Twente, 7500 AE Enschede, The Netherlands |

Publication type: Journal Article

Publication date: 2013-05-13

AIP Publishing

Journal: Applied Physics Letters

scimago Q1

SJR: 0.976

CiteScore: 6.4

Impact factor: 3.5

ISSN: 00036951, 10773118

DOI: 10.1063/1.4805032

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Physics and Astronomy (miscellaneous)

Abstract

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

Journal

Applied Physics Letters

scimago Q1

SJR

0.976

CiteScore

6.4

Impact factor

3.5

ISSN

00036951 (Print)

10773118 (Electronic)

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