The non-equilibrium spin accumulation in ferromagnetic double barrier junctions is shown to govern the transport in small structures. Transport properties of such systems are described by a generalization of the theory of the Coulomb blockade. The spin accumulation enhances the magnetoresistance. The transient non-linear transport properties are predicted to provide a unique experimental evidence of the spin-accumulation in the form of a reversed current on time scales of the order of the spin-flip relaxation time.
@article{arxiv.cond-mat/9811179,
title = {Spin-accumulation in small ferromagnetic double barrier junctions},
author = {Arne Brataas and Yu. V. Nazarov and J. Inoue and Gerrit E. W. Bauer},
journal= {arXiv preprint arXiv:cond-mat/9811179},
year = {2009}
}