Remotely induced magnetism in a normal metal using a superconducting spin-valve

Machiel Geert Flokstra; N. Satchell; J. Kim; G. Burnell; P. J. Curran; S. J. Bending; J. F. K. Cooper; C. J. Kinane; S. Langridge; A. Isidori; N. Pugach; M. Eschrig; H. Luetkens; A. Suter; T. Prokscha; Stephen Leslie Lee

doi:10.1038/nphys3486

Remotely induced magnetism in a normal metal using a superconducting spin-valve

Machiel Geert Flokstra, N. Satchell, J. Kim, G. Burnell, P. J. Curran, S. J. Bending, J. F. K. Cooper, C. J. Kinane, S. Langridge, A. Isidori, N. Pugach, M. Eschrig, H. Luetkens, A. Suter, T. Prokscha, Stephen Leslie Lee

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

Abstract

Superconducting spintronics has emerged in the past decade as a promising new field that seeks to open a new dimension for nanoelectronics by utilizing the internal spin structure of the superconducting Cooper pair as a new degree of freedom^1,2. Its basic building blocks are spin-triplet Cooper pairs with equally aligned spins, which are promoted by proximity of a conventional superconductor to a ferromagnetic material with inhomogeneous macroscopic magnetization³. Using low-energy muon spin-rotation experiments we find an unanticipated effect, in contradiction with the existing theoretical models of superconductivity and ferromagnetism: the appearance of a magnetization in a thin layer of a non-magnetic metal (gold), separated from a ferromagnetic double layer by a 50-nm-thick superconducting layer of Nb. The effect can be controlled either by temperature or by using a magnetic field to control the state of the remote ferromagnetic elements, and may act as a basic building block for a new generation of quantum interference devices based on the spin of a Cooper pair.

Original language	English
Pages (from-to)	57–61
Number of pages	6
Journal	Nature Physics
Volume	12
Issue number	1
Early online date	5 Oct 2015
DOIs	https://doi.org/10.1038/nphys3486
Publication status	Published - Jan 2016

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10.1038/nphys3486

Flokstra_NP _Submitted_13may2015
Copyright 2015 the Authors. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at: https://dx.doi.org/10.1038/nphys3486
Accepted author manuscript, 555 KB
Flokstra_NP _Submitted_13may2015-SI.pdf
Copyright 2015 the Authors. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at: https://dx.doi.org/10.1038/nphys3486
Accepted author manuscript, 657 KB

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Flokstra, M. G., Satchell, N., Kim, J., Burnell, G., Curran, P. J., Bending, S. J., Cooper, J. F. K., Kinane, C. J., Langridge, S., Isidori, A., Pugach, N., Eschrig, M., Luetkens, H., Suter, A., Prokscha, T., & Lee, S. L. (2016). Remotely induced magnetism in a normal metal using a superconducting spin-valve. Nature Physics, 12(1), 57–61. https://doi.org/10.1038/nphys3486

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title = "Remotely induced magnetism in a normal metal using a superconducting spin-valve",

abstract = "Superconducting spintronics has emerged in the past decade as a promising new field that seeks to open a new dimension for nanoelectronics by utilizing the internal spin structure of the superconducting Cooper pair as a new degree of freedom1,2. Its basic building blocks are spin-triplet Cooper pairs with equally aligned spins, which are promoted by proximity of a conventional superconductor to a ferromagnetic material with inhomogeneous macroscopic magnetization3. Using low-energy muon spin-rotation experiments we find an unanticipated effect, in contradiction with the existing theoretical models of superconductivity and ferromagnetism: the appearance of a magnetization in a thin layer of a non-magnetic metal (gold), separated from a ferromagnetic double layer by a 50-nm-thick superconducting layer of Nb. The effect can be controlled either by temperature or by using a magnetic field to control the state of the remote ferromagnetic elements, and may act as a basic building block for a new generation of quantum interference devices based on the spin of a Cooper pair.",

author = "Flokstra, {Machiel Geert} and N. Satchell and J. Kim and G. Burnell and Curran, {P. J.} and Bending, {S. J.} and Cooper, {J. F. K.} and Kinane, {C. J.} and S. Langridge and A. Isidori and N. Pugach and M. Eschrig and H. Luetkens and A. Suter and T. Prokscha and Lee, {Stephen Leslie}",

note = "The authors acknowledge the support of the EPSRC through Grants No. EP/J01060X, No. EP/J010626/1, No. EP/J010650/1, No. EP/J010634/1, and No. EP/J010618/1, support of a studentship supported by JEOL Europe and the ISIS Neutron and Muon Source, and the support of the RFBR via awards No. 13-02-01452-a, and No. 14-02-90018 Bel-a.",

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AU - Flokstra, Machiel Geert

AU - Satchell, N.

AU - Kim, J.

AU - Burnell, G.

AU - Curran, P. J.

AU - Bending, S. J.

AU - Cooper, J. F. K.

AU - Kinane, C. J.

AU - Langridge, S.

AU - Isidori, A.

AU - Pugach, N.

AU - Eschrig, M.

AU - Luetkens, H.

AU - Suter, A.

AU - Prokscha, T.

AU - Lee, Stephen Leslie

N1 - The authors acknowledge the support of the EPSRC through Grants No. EP/J01060X, No. EP/J010626/1, No. EP/J010650/1, No. EP/J010634/1, and No. EP/J010618/1, support of a studentship supported by JEOL Europe and the ISIS Neutron and Muon Source, and the support of the RFBR via awards No. 13-02-01452-a, and No. 14-02-90018 Bel-a.

PY - 2016/1

Y1 - 2016/1

N2 - Superconducting spintronics has emerged in the past decade as a promising new field that seeks to open a new dimension for nanoelectronics by utilizing the internal spin structure of the superconducting Cooper pair as a new degree of freedom1,2. Its basic building blocks are spin-triplet Cooper pairs with equally aligned spins, which are promoted by proximity of a conventional superconductor to a ferromagnetic material with inhomogeneous macroscopic magnetization3. Using low-energy muon spin-rotation experiments we find an unanticipated effect, in contradiction with the existing theoretical models of superconductivity and ferromagnetism: the appearance of a magnetization in a thin layer of a non-magnetic metal (gold), separated from a ferromagnetic double layer by a 50-nm-thick superconducting layer of Nb. The effect can be controlled either by temperature or by using a magnetic field to control the state of the remote ferromagnetic elements, and may act as a basic building block for a new generation of quantum interference devices based on the spin of a Cooper pair.

AB - Superconducting spintronics has emerged in the past decade as a promising new field that seeks to open a new dimension for nanoelectronics by utilizing the internal spin structure of the superconducting Cooper pair as a new degree of freedom1,2. Its basic building blocks are spin-triplet Cooper pairs with equally aligned spins, which are promoted by proximity of a conventional superconductor to a ferromagnetic material with inhomogeneous macroscopic magnetization3. Using low-energy muon spin-rotation experiments we find an unanticipated effect, in contradiction with the existing theoretical models of superconductivity and ferromagnetism: the appearance of a magnetization in a thin layer of a non-magnetic metal (gold), separated from a ferromagnetic double layer by a 50-nm-thick superconducting layer of Nb. The effect can be controlled either by temperature or by using a magnetic field to control the state of the remote ferromagnetic elements, and may act as a basic building block for a new generation of quantum interference devices based on the spin of a Cooper pair.

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Remotely induced magnetism in a normal metal using a superconducting spin-valve

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Remotely induced magnetism in a normal metal using a superconducting spin-valve

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