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Superconductivity-induced change in magnetic anisotropy in epitaxial ferromagnet-superconductor hybrids with spin-orbit interaction

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journal contribution
posted on 16.07.2020, 10:16 by César González-Ruano, Lina G Johnsen, Diego Caso, Coriolan Tiusan, Michel Hehn, Niladri BanerjeeNiladri Banerjee, Jacob Linder, Farkhad G Aliev
The interaction between superconductivity and ferromagnetism in thin film superconductor/ferromagnet heterostructures is usually reflected by a change in superconductivity of the S layer set by the magnetic state of the F layers. Here we report the converse effect: transformation of the magnetocrystalline anisotropy of a single Fe(001) layer, and thus its preferred magnetization orientation, driven by the superconductivity of an underlying V layer through a spin-orbit coupled MgO interface. We attribute this to an additional contribution to the free energy of the ferromagnet arising from the controlled generation of triplet Cooper pairs, which depends on the relative angle between the exchange field of the ferromagnet and the spin-orbit field. This is fundamentally different from the commonly observed magnetic domain modification by Meissner screening or domain wall-vortex interaction, and it offers the ability to fundamentally tune magnetic anisotropies using superconductivity—a key step in designing future cryogenic magnetic memories.

Funding

Spin-orbit coupling-dirven superconducting spintronics : EP/S016430/1

History

School

  • Science

Department

  • Physics

Published in

Physical Review B

Volume

102

Issue

2

Pages

020405

Publisher

American Physical Society (APS)

Version

VoR (Version of Record)

Rights holder

© American Physical Society

Publisher statement

This paper was accepted for publication in the journal Physical Review B and the definitive published version is available at https://doi.org/10.1103/physrevb.102.020405

Acceptance date

01/07/2020

Publication date

2020-07-15

Copyright date

2020

ISSN

2469-9950

eISSN

2469-9969

Language

en

Depositor

Dr Niladri Banerjee. Deposit date: 15 July 2020

Article number

020405

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