Giant electromagnetic proximity effect in superconductor/ferromagnet superlattices

Abstract

We show that in superlattices with alternating superconducting (S) and ferromagnetic (F) layers the spontaneous magnetic field induced in the superconducting layers due to the electromagnetic proximity effect becomes dramatically enhanced compared to the previously studied S/F bilayers. The effect reveals itself for the in-plane orientation of the magnetic moments both for ferromagnetic and anti-ferromagnetic ordering of the moments in the F layers. In the finite size samples the magnetic field decays from the sample surface towards the bulk of the structure, and the decay length strongly depends on the relative orientation of the sample surface, the layers planes and magnetic moments in the F layers. The obtained results provide additional insights into experimental data on the neutron scattering in Nb/Gd superlattices.

6 figures

References in corpus (9)

• Inverse proximity effect in superconductor-ferromagnet bilayer structures
• Skyrmion-(Anti)Vortex Coupling in a Chiral Magnet-Superconductor Heterostructure
• Experimental Observation of the Inverse Proximity Effect in Superconductor/Ferromagnet Layered Structures
• Oscillations of Induced Magnetization in Superconductor-Ferromagnet Heterostructures
• Evidence for spin-triplet superconducting correlations in metal-oxide heterostructures with non-collinear magnetization
• Spin polarization and orbital effects in superconductor-ferromagnet structures
• Magnetic proximity effect in [Nb/Gd] superlattices seen by neutron scattering
• Domain-wall and reverse-domain superconducting states of a Pb thin-film bridge on a ferromagnetic BaFe_{12}O_{19} single crystal
• On the Explanation of the Paramagnetic Meissner Effect in Superconductor/Ferromagnet Heterostructures