In this work, we study theoretically the properties of S-F/N-sIS type Josephson junctions in the frame of the quasiclassical Usadel formalism. The structure consists of two superconducting electrodes (S), a tunnel barrier (I), a combined normal metal/ferromagnet (N/F) interlayer, and a thin superconducting film (s). We demonstrate the breakdown of a spatial uniformity of the superconducting order in the s-film and its decomposition into domains with a phase shift π. The effect is sensitive to the thickness of the s layer and the widths of the F and N films in the direction along the sIS interface. We predict the existence of a regime where the structure has two energy minima and can be switched between them by an electric current injected laterally into the structure. The state of the system can be non-destructively read by an electric current flowing across the junction.
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25 January 2016
Research Article|
January 25 2016
Superconducting phase domains for memory applications
S. V. Bakurskiy;
S. V. Bakurskiy
1Skobeltsyn Institute of Nuclear Physics,
Lomonosov Moscow State University
, Leninskie Gory, Moscow 119991, Russian Federation
2Faculty of Physics,
Lomonosov Moscow State University
, Leninskie Gory, Moscow 119992, Russian Federation
3
Moscow Institute of Physics and Technology
, Dolgoprudny, Moscow Region 141700, Russian Federation
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N. V. Klenov;
N. V. Klenov
1Skobeltsyn Institute of Nuclear Physics,
Lomonosov Moscow State University
, Leninskie Gory, Moscow 119991, Russian Federation
2Faculty of Physics,
Lomonosov Moscow State University
, Leninskie Gory, Moscow 119992, Russian Federation
3
Moscow Institute of Physics and Technology
, Dolgoprudny, Moscow Region 141700, Russian Federation
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I. I. Soloviev;
I. I. Soloviev
1Skobeltsyn Institute of Nuclear Physics,
Lomonosov Moscow State University
, Leninskie Gory, Moscow 119991, Russian Federation
3
Moscow Institute of Physics and Technology
, Dolgoprudny, Moscow Region 141700, Russian Federation
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M. Yu. Kupriyanov;
M. Yu. Kupriyanov
1Skobeltsyn Institute of Nuclear Physics,
Lomonosov Moscow State University
, Leninskie Gory, Moscow 119991, Russian Federation
3
Moscow Institute of Physics and Technology
, Dolgoprudny, Moscow Region 141700, Russian Federation
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A. A. Golubov
A. A. Golubov
3
Moscow Institute of Physics and Technology
, Dolgoprudny, Moscow Region 141700, Russian Federation
4Faculty of Science and Technology and MESA+ Institute for Nanotechnology,
University of Twente
, 7500 AE Enschede, The Netherlands
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Appl. Phys. Lett. 108, 042602 (2016)
Article history
Received:
November 15 2015
Accepted:
January 12 2016
Citation
S. V. Bakurskiy, N. V. Klenov, I. I. Soloviev, M. Yu. Kupriyanov, A. A. Golubov; Superconducting phase domains for memory applications. Appl. Phys. Lett. 25 January 2016; 108 (4): 042602. https://doi.org/10.1063/1.4940440
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