Little-Parks effect governed by magnetic nanostructures with out-of-plane magnetization.

Abstract:

:Little-Parks effect names the oscillations in the superconducting critical temperature as a function of the magnetic field. This effect is related to the geometry of the sample. In this work, we show that this effect can be enhanced and manipulated by the inclusion of magnetic nanostructures with perpendicular magnetization. These magnetic nanodots generate stray fields with enough strength to produce superconducting vortex-antivortex pairs. So that, the L-P effect deviation from the usual geometrical constrictions is due to the interplay between local magnetic stray fields and superconducting vortices. Moreover, we compare our results with a low-stray field sample (i.e. with the dots in magnetic vortex state) showing how the enhancement of the L-P effect can be explained by an increment of the effective size of the nanodots.

journal_name

Sci Rep

journal_title

Scientific reports

authors

de Ory MC,Rollano V,Gomez A,Menghini M,Muñoz-Noval A,Gonzalez EM,Vicent JL

doi

10.1038/s41598-020-67317-7

subject

Has Abstract

pub_date

2020-06-25 00:00:00

pages

10370

issue

1

issn

2045-2322

pii

10.1038/s41598-020-67317-7

journal_volume

10

pub_type

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