Remotely induced magnetism in a normal metal using a superconducting spin-valve
Abstract
Superconducting 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.
Keywords
Cite
@article{arxiv.1505.03565,
title = {Remotely induced magnetism in a normal metal using a superconducting spin-valve},
author = {M. G. Flokstra and N. Satchell and J. Kim and G. Burnell and P. J. Curran and S. J. Bending and J. F. K. Cooper and C. J. Kinane and S. Langridge and A. Isidori and N. Pugach and M. Eschrig and H. Luetkens and A. Suter and T. Prokscha and S. L. Lee},
journal= {arXiv preprint arXiv:1505.03565},
year = {2016}
}
Comments
17 pages, 4 figures