Controlling the proximity effect in a Co/Nb multilayer: The properties of electronic transport
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BAKURSKIY, Sergey V.; KUPRIYANOV, Mihail; KLENOV, Nikolai V.; SOLOVIEV, Igor I.; SCHEGOLEV, Andrey; MORARI, Roman; KHAYDUKOV, Yu N.; SIDORENKO, Anatolie. Controlling the proximity effect in a Co/Nb multilayer: The properties of electronic transport. In: Beilstein Journal of Nanotechnology. 2020, nr. 11, pp. 1336-1345. ISSN 2190-4286.
10.3762/BJNANO.11.118
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Beilstein Journal of Nanotechnology
Numărul 11 / 2020 / ISSN 2190-4286

Controlling the proximity effect in a Co/Nb multilayer: The properties of electronic transport

DOI: https://doi.org/10.3762/BJNANO.11.118

Pag. 1336-1345

Bakurskiy Sergey V.1, Kupriyanov Mihail1, Klenov Nikolai V.12, Soloviev Igor I.1, Schegolev Andrey2, Morari Roman34, Khaydukov Yu N.15, Sidorenko Anatolie64
 
1 Lomonosov Moscow State University,
2 Moscow Technical University of Communications and Informatics,
3 Moscow Institute of Physics and Technology,
4 Institute of the Electronic Engineering and Nanotechnologies "D. Ghitu",
5 Max Planck Institute for Solid State Research,
6 Orel State University
 
Disponibil în IBN: 22 octombrie 2020


Rezumat

We present both theoretical and experimental investigations of the proximity effect in a stack-like superconductor/ferromagnetic (S/F) superlattice, where ferromagnetic layers with different thicknesses and coercive fields are made of Co. Calculations based on the Usadel equations allow us to find the conditions at which switching from the parallel to the antiparallel alignment of the neighboring F-layers leads to a significant change of the superconducting order parameter in superconductive thin films. We experimentally study the transport properties of a lithographically patterned Nb/Co multilayer. We observe that the resistive transition of the multilayer structure has multiple steps, which we attribute to the transition of individual superconductive layers with the critical temperature, Tc, depending on the local magnetization orientation of the neighboring F-layers. We argue that such superlattices can be used as tunable kinetic inductors designed for artificial neural networks representing the information in a "current domain". 

Cuvinte-cheie
Cryogenic computing, Spin-valve, Superconducting neural network, Superconducting spintronics

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