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Superconductivity assisted change of the perpendicular magnetic anisotropy in V/MgO/Fe junctions

Controlling the perpendicular magnetic anisotropy (PMA) in thin films has received considerable attention in recent years due to its technological importance. PMA based devices usually involve heavy-metal (oxide)/ferromagnetic-metal bilayers, where, thanks to interfacial spin-orbit coupling (SOC), t...

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Autores principales: González-Ruano, César, Caso, Diego, Johnsen, Lina G., Tiusan, Coriolan, Hehn, Michel, Banerjee, Niladri, Linder, Jacob, Aliev, Farkhad G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8463706/
https://www.ncbi.nlm.nih.gov/pubmed/34561472
http://dx.doi.org/10.1038/s41598-021-98079-5
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author González-Ruano, César
Caso, Diego
Johnsen, Lina G.
Tiusan, Coriolan
Hehn, Michel
Banerjee, Niladri
Linder, Jacob
Aliev, Farkhad G.
author_facet González-Ruano, César
Caso, Diego
Johnsen, Lina G.
Tiusan, Coriolan
Hehn, Michel
Banerjee, Niladri
Linder, Jacob
Aliev, Farkhad G.
author_sort González-Ruano, César
collection PubMed
description Controlling the perpendicular magnetic anisotropy (PMA) in thin films has received considerable attention in recent years due to its technological importance. PMA based devices usually involve heavy-metal (oxide)/ferromagnetic-metal bilayers, where, thanks to interfacial spin-orbit coupling (SOC), the in-plane (IP) stability of the magnetisation is broken. Here we show that in V/MgO/Fe(001) epitaxial junctions with competing in-plane and out-of-plane (OOP) magnetic anisotropies, the SOC mediated interaction between a ferromagnet (FM) and a superconductor (SC) enhances the effective PMA below the superconducting transition. This produces a partial magnetisation reorientation without any applied field for all but the largest junctions, where the IP anisotropy is more robust; for the smallest junctions there is a reduction of the field required to induce a complete OOP transition ([Formula: see text] ) due to the stronger competition between the IP and OOP anisotropies. Our results suggest that the degree of effective PMA could be controlled by the junction lateral size in the presence of superconductivity and an applied electric field. We also discuss how the [Formula: see text] field could be affected by the interaction between magnetic stray fields and superconducting vortices. Our experimental findings, supported by numerical modelling of the ferromagnet-superconductor interaction, open pathways to active control of magnetic anisotropy in the emerging dissipation-free superconducting spin electronics.
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spelling pubmed-84637062021-09-29 Superconductivity assisted change of the perpendicular magnetic anisotropy in V/MgO/Fe junctions González-Ruano, César Caso, Diego Johnsen, Lina G. Tiusan, Coriolan Hehn, Michel Banerjee, Niladri Linder, Jacob Aliev, Farkhad G. Sci Rep Article Controlling the perpendicular magnetic anisotropy (PMA) in thin films has received considerable attention in recent years due to its technological importance. PMA based devices usually involve heavy-metal (oxide)/ferromagnetic-metal bilayers, where, thanks to interfacial spin-orbit coupling (SOC), the in-plane (IP) stability of the magnetisation is broken. Here we show that in V/MgO/Fe(001) epitaxial junctions with competing in-plane and out-of-plane (OOP) magnetic anisotropies, the SOC mediated interaction between a ferromagnet (FM) and a superconductor (SC) enhances the effective PMA below the superconducting transition. This produces a partial magnetisation reorientation without any applied field for all but the largest junctions, where the IP anisotropy is more robust; for the smallest junctions there is a reduction of the field required to induce a complete OOP transition ([Formula: see text] ) due to the stronger competition between the IP and OOP anisotropies. Our results suggest that the degree of effective PMA could be controlled by the junction lateral size in the presence of superconductivity and an applied electric field. We also discuss how the [Formula: see text] field could be affected by the interaction between magnetic stray fields and superconducting vortices. Our experimental findings, supported by numerical modelling of the ferromagnet-superconductor interaction, open pathways to active control of magnetic anisotropy in the emerging dissipation-free superconducting spin electronics. Nature Publishing Group UK 2021-09-24 /pmc/articles/PMC8463706/ /pubmed/34561472 http://dx.doi.org/10.1038/s41598-021-98079-5 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
González-Ruano, César
Caso, Diego
Johnsen, Lina G.
Tiusan, Coriolan
Hehn, Michel
Banerjee, Niladri
Linder, Jacob
Aliev, Farkhad G.
Superconductivity assisted change of the perpendicular magnetic anisotropy in V/MgO/Fe junctions
title Superconductivity assisted change of the perpendicular magnetic anisotropy in V/MgO/Fe junctions
title_full Superconductivity assisted change of the perpendicular magnetic anisotropy in V/MgO/Fe junctions
title_fullStr Superconductivity assisted change of the perpendicular magnetic anisotropy in V/MgO/Fe junctions
title_full_unstemmed Superconductivity assisted change of the perpendicular magnetic anisotropy in V/MgO/Fe junctions
title_short Superconductivity assisted change of the perpendicular magnetic anisotropy in V/MgO/Fe junctions
title_sort superconductivity assisted change of the perpendicular magnetic anisotropy in v/mgo/fe junctions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8463706/
https://www.ncbi.nlm.nih.gov/pubmed/34561472
http://dx.doi.org/10.1038/s41598-021-98079-5
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