Superconducting Probe of Electronic Correlations and Exchange Field Based on the Proximity Effect in F/S Nanostructures

M. G. Khusainov; M. M. Khusainov; Y. N. Proshin

doi:10.4028/www.scientific.net/SSP.190.413

Paper Titles

Structural and Magnetic Properties of the Periodic [Fe(5nm)/V(5nm)]₁₀ and [Fe (3nm)/V(3nm)]₂₀ Systems
p.396

Current-Phase Relation in Josephson Junctions with Complex Ferromagnetic/Normal Metal Interlayers
p.401

DC Magnetic Susceptibility of CeCoGe_2.36Si_0.64 under High Pressure
p.405

Superconducting Critical Temperature and Magnetic Inhomogeneities in Superconductor/Ferromagnet/Superconductor Trilayers
p.409

Superconducting Probe of Electronic Correlations and Exchange Field Based on the Proximity Effect in F/S Nanostructures
p.413

Phase Transition in Frustrated Heisenberg Antiferromagnet on a Triangular Lattice with Next-Nearest Neighbor Interactions
p.417

New Ternary Boride EuRh4B4 Synthesized under High Pressure and Temperature
p.421

The Josephson Current in the SFS Sandwich Taking into Account the Proximity Effect and Umklapp Processes
p.425

On the Superconductivity of High-Spin Transition Metal Compounds
p.429

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Superconducting Probe of Electronic Correlations and Exchange Field Based on the Proximity Effect in F/S Nanostructures

Abstract:

The proximity effect and competition between the BCS and LOFF states are studied in the Cooper limit for thin F/S and F/S/F nanostructures, where F is a ferromagnet and S is a superconductor. The dependences of the critical temperature T_c on the exchange field I, electron correlations λ_f, and the thickness d_f of the F layer are derived for F/S bilayers and F/S/F trilayers. Two new π-phase superconducting states with electronelectron repulsion in the F layers of F/S/F trilayers are predicted. A 2D LOFF state in F/S/F trilayers is possible only in the presence of a weak magnetic field and the appropriate parameters of the F and S layers. The absence of the suppression of 3D superconductivity in short-period Gd/La superlattices is explained and the electronelectron coupling constant in gadolinium is predicted. A method of superconducting probe spectroscopy based on the proximity effect is proposed for determining the symmetry of the order parameter, the magnitude and sign of electron correlations, and the exchange field in various nanomagnets F.