Nanoengineered magnetic-field-induced superconductivity

TL;DR

This paper demonstrates that nanoengineered magnetic dot lattices can significantly enhance and control the critical magnetic fields of superconducting films through magnetic-field-induced superconductivity.

Contribution

It introduces a novel hybrid superconductor/ferromagnet system with nanoengineered magnetic dots that enables tunable superconducting properties via magnetic state switching.

Findings

Enhanced critical fields in superconducting films due to magnetic dot arrays

Magnetic-field-induced superconductivity observed in hybrid systems

Control of superconducting parameters through magnetic state switching

Abstract

The perpendicular critical fields of a superconducting film have been strongly enhanced by using a nanoengineered lattice of magnetic dots (dipoles) on top of the film. Magnetic-field-induced superconductivity is observed in these hybrid superconductor / ferromagnet systems due to the compensation of the applied field between the dots by the stray field of the dipole array. By switching between different magnetic states of the nanoengineered field compensator, the critical parameters of the superconductor can be effectively controlled.