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Abrikosov vortex nucleation and its detrimental effect on superconducting spin pumping in Pt/Nb/Ni80Fe20/Nb/Pt proximity structures

Jeon, K-R; Ciccarelli, C; Kurebayashi, H; Cohen, LF; Komori, S; Robinson, JWA; Blamire, MG; (2019) Abrikosov vortex nucleation and its detrimental effect on superconducting spin pumping in Pt/Nb/Ni80Fe20/Nb/Pt proximity structures. Physical Review B , 99 , Article 144503. 10.1103/PhysRevB.99.144503. Green open access

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Abstract

We report Abrikosov vortex nucleation in Pt / Nb / Ni 80 Fe 20 / Nb / Pt proximity-coupled structures under oblique ferromagnetic resonance that turns out to be detrimental to superconducting spin pumping. By measuring an out-of-plane field-angle θ H dependence and comparing with Pt-absent control samples, we show that as θ H increases, the degree of enhancement (suppression) of spin pumping efficiency in the superconducting state for the Pt-present (Pt-absent) sample diminishes and it reverts to the normal state value at θ H = 90 ∘ . This can be explained in terms of a substantial out-of-plane component of the resonance field for the Ni 80 Fe 20 layer (with in-plane magnetization anisotropy and high aspect ratio) that approaches the upper critical field of the Nb, turning a large fraction of the singlet superconductor volume into the normal state.

Type: Article
Title: Abrikosov vortex nucleation and its detrimental effect on superconducting spin pumping in Pt/Nb/Ni80Fe20/Nb/Pt proximity structures
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevB.99.144503
Publisher version: https://doi.org/10.1103/PhysRevB.99.144503
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Technology, Physical Sciences, Materials Science, Multidisciplinary, Physics, Applied, Physics, Condensed Matter, Materials Science, Physics, FERROMAGNETIC-RESONANCE, MAGNETIZATION
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/10072932
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