Controlling the proximity effect in a Co/Nb multilayer: the properties of electronic transport.
S. V. Bakurskiy,Mikhail Yu. Kupriyanov,Nikolay V. Klenov,Igor I. Soloviev,Igor I. Soloviev,A. E. Schegolev,R. Morari,R. Morari,Yury Khaydukov,Yury Khaydukov,Anatoli S. Sidorenko +10 more
TLDR
It is argued that such superlattices can be used as tunable kinetic inductors designed for artificial neural networks representing the information in a “current domain”, based on calculations based on the Usadel equations.Abstract:
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, T c, 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".read more
Citations
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Journal ArticleDOI
Learning cell for superconducting neural networks
Journal ArticleDOI
In situ transport characterization of magnetic states in Nb/Co superconductor/ferromagnet heterostructures.
O. M. Kapran,R. Morari,Taras Golod,Evgenii A. Borodianskyi,Vladimir Boian,Andrei A. Prepelita,Nikolay V. Klenov,Anatoli S. Sidorenko,Vladimir M. Krasnov +8 more
TL;DR: The range of parameters and the procedure for in situ control of devices based on S/F heterostructures are identified and the scissor state represents the noncollinear magnetic state in which the unconventional odd-frequency spin-triplet order parameter should appear.
Journal ArticleDOI
Tunable superconducting neurons for networks based on radial basis functions
A. E. Schegolev,Nikolay V. Klenov,S. V. Bakurskiy,Igor I. Soloviev,M. Yu. Kupriyanov,M. V. Tereshonok,Anatolie Sidorenko +6 more
TL;DR: This paper proposes and investigates heterostructures designed for the implementation of adjustable inductors that consist of superconducting, ferromagnetic, and normal layers and examines the static and dynamic activation functions of the proposed neuron.
Journal ArticleDOI
Functional nanostructures for electronics, spintronics and sensors.
TL;DR: One of the most important and promising of these targeted applications are superconducting spintronic nanostructures for supercomputers of novel, “post-Moore” generation.
Journal ArticleDOI
Density of states and current-voltage characteristics in SIsFS junctions.
S. V. Bakurskiy,A.A. Neilo,N. V. Klenov,Igor I. Soloviev,Alexandre Avraamovitch Golubov,M. Yu. Kupriyanov +5 more
TL;DR: In this paper, the density of states (DOS) inside superconducting Josephson SIsFS junctions with complex interlayer consisting of a thin s-layer between insulator I and a ferromagnetic metal F was studied.
References
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Generalized Diffusion Equation for Superconducting Alloys
TL;DR: Eilenberger's transportlike equations for a superconductor of type II can be simplified very much in the dirty limit, and a diffusionlike equation is derived which is the generalization of the de Gennes-Maki theory for dirty superconductors to arbitrary values of the order parameter.
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Controllable 0–π Josephson junctions containing a ferromagnetic spin valve
Eric C. Gingrich,Bethany Niedzielski,Joseph A. Glick,Yixing Wang,Yixing Wang,Donald L. Miller,Reza Loloee,William P. Pratt,Norman O. Birge +8 more
TL;DR: The phase state of a Josephson junction containing two ferromagnetic layers can be toggled between 0 and π by changing the relative orientation of the two magnetizations as mentioned in this paper. But the phase state is invariant to the thickness of the material.
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Long range triplet Josephson effect through a ferromagnetic trilayer
TL;DR: In this article, the authors studied the Josephson current through a ferromagnetic trilayer, in both diffusive and clean limits, and determined the conditions for the current to be dominated by another contribution originating from the long range triplet proximity effect.
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Enhancement of the Josephson current by an exchange field in superconductor-ferromagnet structures.
F. S. Bergeret,Anatoly F. Volkov,Anatoly F. Volkov,Konstantin B. Efetov,Konstantin B. Efetov +4 more
TL;DR: It is demonstrated that the critical Josephson current I(c) in the junction strongly depends on the relative orientation of the effective exchange field h of the bilayers, which in the case of an antiparallel orientation increases at low temperatures with increasing h and at zero temperature has a singularity when h equals the superconducting gap Delta.