We report direct experimental evidence showing induced magnetic moments on Ge at the interface in an Fe/Ge system. Details of the x-ray magnetic circular dichroism and resonant magnetic scattering at the Ge L edge demonstrate the presence of spin-polarized {\it s} states at the Fermi level, as well as {\it d} character moments at higher energy, which are both oriented antiparallel to the moment of the Fe layer. Use of the sum rules enables extraction of the L/S ratio, which is zero for the {\it s} part and ∼0.5 for the {\it d} component. These results are consistent with layer-resolved electronic structure calculations, which estimate the {\it s} and {\it d} components of the Ge moment are anti-parallel to the Fe {\it 3d} moment and have a magnitude of ∼0.01μB.
@article{arxiv.cond-mat/0307628,
title = {Induced Ge Spin Polarization at the Fe/Ge Interface},
author = {J. W. Freeland and R. H. Kodama and M. Vedpathak and S. C. Erwin and D. J. Keavney and R. Winarski and P. Ryan and R. A. Rosenberg},
journal= {arXiv preprint arXiv:cond-mat/0307628},
year = {2009}
}