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29 March 2024
 
  » arxiv » 1505.3565

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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 ;
Date 14 May 2015
AbstractSuperconducting spintronics has emerged in the last 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 entirely unexpected novel effect: 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 by either 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.
Source arXiv, 1505.3565
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