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

M. G. 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; S. L. Lee

doi:10.1038/nphys3486

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

M. G. 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, S. L. Lee

^*Corresponding author for this work

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

59 Citations (Scopus)

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. 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 magnetization. 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	5
Journal	Nature Physics
Volume	12
Issue number	1
DOIs	https://doi.org/10.1038/nphys3486
Publication status	Published - 7 Jan 2016
Externally published	Yes

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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 freedom. 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 magnetization. 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, \{M. G.\} 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, \{S. L.\}",

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AU - Flokstra, M. G.

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, S. L.

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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 freedom. 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 magnetization. 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 freedom. 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 magnetization. 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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JO - Nature Physics

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

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