Controlling the electromagnetic proximity effect by tuning the mixing between superconducting and ferromagnetic order

R. Stewart; M. G. Flokstra; M. Rogers; N. Satchell; G. Burnell; D. Miller; H. Luetkens; T. Prokscha; A. Suter; E. Morenzoni; S. L. Lee

doi:10.1103/PhysRevB.100.020505

Controlling the electromagnetic proximity effect by tuning the mixing between superconducting and ferromagnetic order

R. Stewart, M. G. Flokstra, M. Rogers, N. Satchell, G. Burnell, D. Miller, H. Luetkens, T. Prokscha, A. Suter, E. Morenzoni, S. L. Lee

Research output: Contribution to journal › Article › peer-review

Abstract

We present low-energy muon-spin rotation measurements on Cu/Nb/AlO_x/Co thin films that probe the newly described electromagnetic (EM) proximity effect. By varying the thickness of the insulating AlO_x layer we control the degree of coupling between the superconductor and ferromagnet and thus the EM proximity effect. For barrier thicknesses up to 4 nm we find both a small contact-dependent reduction in the standard Meissner effect and a larger diamagnetic contribution originating at the Nb/AlO_x/Co interface which decays away over a lengthscale far exceeding the superconducting coherence length. This second component we attribute to the EM proximity effect. Our analysis provides compelling experimental evidence for previously neglected electromagnetic effects within proximity coupled systems.

Original language	English
Article number	020505(R)
Number of pages	5
Journal	Physical Review B
Volume	100
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.100.020505
Publication status	Published - 12 Jul 2019

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PhysRevB.100.020505
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Critical Mass: Emergrent Nanomaterials (Critcal Mass Proposal)
Irvine, J. T. S. (PI), Connor, P. A. (CoI) & Savaniu, C. D. (CoI)
1/06/18 → 31/01/23
Project: Standard
Controlling Emergent Orders in Quantum: Controlling Emergent Orders in Quantum Materials
Wahl, P. (PI), Hooley, C. (CoI) & Lee, S. (CoI)
EPSRC
1/06/18 → 30/06/23
Project: Standard
Critical Mass: Emergent Nanomaterials (Critical Mass Proposal)
Lee, S. (PI)
1/06/18 → 31/05/22
Project: Standard

Cite this

@article{e93065ef1d024e7db59acaf3a7d720d1,

title = "Controlling the electromagnetic proximity effect by tuning the mixing between superconducting and ferromagnetic order",

abstract = "We present low-energy muon-spin rotation measurements on Cu/Nb/AlOx/Co thin films that probe the newly described electromagnetic (EM) proximity effect. By varying the thickness of the insulating AlOx layer we control the degree of coupling between the superconductor and ferromagnet and thus the EM proximity effect. For barrier thicknesses up to 4 nm we find both a small contact-dependent reduction in the standard Meissner effect and a larger diamagnetic contribution originating at the Nb/AlOx/Co interface which decays away over a lengthscale far exceeding the superconducting coherence length. This second component we attribute to the EM proximity effect. Our analysis provides compelling experimental evidence for previously neglected electromagnetic effects within proximity coupled systems.",

author = "R. Stewart and Flokstra, {M. G.} and M. Rogers and N. Satchell and G. Burnell and D. Miller and H. Luetkens and T. Prokscha and A. Suter and E. Morenzoni and Lee, {S. L.}",

note = "The work was supported financially through the following EPSRC grants: Grants No. EP/I031014/1, No. EP/J01060X, No. EP/J010634/1, No. EP/R031924/1, No. EP/R023522/1, No. EP/L015110/1, and No. EP/L017008/1 and has received funding through the European Union's Horizon 2020 Research and Innovation Programme under the Marie Sk{\l}odowska-Curie Grant Agreement No. 743791 (SUPERSPIN)",

year = "2019",

month = jul,

day = "12",

doi = "10.1103/PhysRevB.100.020505",

language = "English",

volume = "100",

journal = "Physical Review B",

issn = "1098-0121",

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TY - JOUR

T1 - Controlling the electromagnetic proximity effect by tuning the mixing between superconducting and ferromagnetic order

AU - Stewart, R.

AU - Flokstra, M. G.

AU - Rogers, M.

AU - Satchell, N.

AU - Burnell, G.

AU - Miller, D.

AU - Luetkens, H.

AU - Prokscha, T.

AU - Suter, A.

AU - Morenzoni, E.

AU - Lee, S. L.

N1 - The work was supported financially through the following EPSRC grants: Grants No. EP/I031014/1, No. EP/J01060X, No. EP/J010634/1, No. EP/R031924/1, No. EP/R023522/1, No. EP/L015110/1, and No. EP/L017008/1 and has received funding through the European Union's Horizon 2020 Research and Innovation Programme under the Marie Skłodowska-Curie Grant Agreement No. 743791 (SUPERSPIN)

PY - 2019/7/12

Y1 - 2019/7/12

N2 - We present low-energy muon-spin rotation measurements on Cu/Nb/AlOx/Co thin films that probe the newly described electromagnetic (EM) proximity effect. By varying the thickness of the insulating AlOx layer we control the degree of coupling between the superconductor and ferromagnet and thus the EM proximity effect. For barrier thicknesses up to 4 nm we find both a small contact-dependent reduction in the standard Meissner effect and a larger diamagnetic contribution originating at the Nb/AlOx/Co interface which decays away over a lengthscale far exceeding the superconducting coherence length. This second component we attribute to the EM proximity effect. Our analysis provides compelling experimental evidence for previously neglected electromagnetic effects within proximity coupled systems.

AB - We present low-energy muon-spin rotation measurements on Cu/Nb/AlOx/Co thin films that probe the newly described electromagnetic (EM) proximity effect. By varying the thickness of the insulating AlOx layer we control the degree of coupling between the superconductor and ferromagnet and thus the EM proximity effect. For barrier thicknesses up to 4 nm we find both a small contact-dependent reduction in the standard Meissner effect and a larger diamagnetic contribution originating at the Nb/AlOx/Co interface which decays away over a lengthscale far exceeding the superconducting coherence length. This second component we attribute to the EM proximity effect. Our analysis provides compelling experimental evidence for previously neglected electromagnetic effects within proximity coupled systems.

U2 - 10.1103/PhysRevB.100.020505

DO - 10.1103/PhysRevB.100.020505

M3 - Article

SN - 1098-0121

VL - 100

JO - Physical Review B

JF - Physical Review B

IS - 2

M1 - 020505(R)

ER -

Controlling the electromagnetic proximity effect by tuning the mixing between superconducting and ferromagnetic order

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Critical Mass: Emergrent Nanomaterials (Critcal Mass Proposal)

Controlling Emergent Orders in Quantum: Controlling Emergent Orders in Quantum Materials

Critical Mass: Emergent Nanomaterials (Critical Mass Proposal)

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