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Visualizing domain wall and reverse domain superconductivity
Journal article   Open access   Peer reviewed

Visualizing domain wall and reverse domain superconductivity

M. Iavarone, S. A. Moore, J. Fedor, S. T. Ciocys, G. Karapetrov, J. Pearson, V. Novosad, S. D. Bader and Argonne National Lab. (ANL), Argonne, IL (United States)
Nature communications, v 5(1), pp 4766-4766
01 Aug 2014
DOI: https://doi.org/10.1038/ncomms5766
PMID: 25164004
url
https://doi.org/10.1038/ncomms5766View
Published, Version of Record (VoR)CC BY V4.0,  Open

Abstract

Multidisciplinary Sciences Science & Technology Science & Technology - Other Topics
In magnetically coupled, planar ferromagnet-superconductor (F/S) hybrid structures, magnetic domain walls can be used to spatially confine the superconductivity. In contrast to a superconductor in a uniform applied magnetic field, the nucleation of the superconducting order parameter in F/S structures is governed by the inhomogeneous magnetic field distribution. The interplay between the superconductivity localized at the domain walls and far from the walls leads to effects such as re-entrant superconductivity and reverse domain superconductivity with the critical temperature depending upon the location. Here we use scanning tunnelling spectroscopy to directly image the nucleation of superconductivity at the domain wall in F/S structures realized with Co-Pd multilayers and Pb thin films. Our results demonstrate that such F/S structures are attractive model systems that offer the possibility to control the strength and the location of the superconducting nucleus by applying an external magnetic field, potentially useful to guide vortices for computing application.

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Domestic collaboration
Web of Science research areas
Physics, Applied
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