Journal
NATURE PHYSICS
Volume 12, Issue 1, Pages 57-U87Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHYS3486
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Funding
- EPSRC [EP/J01060X, EP/J010626/1, EP/J010650/1, EP/J010634/1, EP/J010618/1]
- JEOL Europe
- ISIS Neutron and Muon Source
- RFBR [13-02-01452-a, 15-52-10045-Ko-a, 14-02-90018 Bel-a]
- EPSRC [EP/J01060X/1, EP/G011230/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J01060X/1, EP/G011230/1, EP/J010618/1, EP/J010634/1, EP/J010650/1, EP/J010626/1] Funding Source: researchfish
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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 magnetization(3). 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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