Motivated by the recent achievements in manipulation of C60 molecules in STM experiments, we study theoretically the structure and electronic properties of a C60 molecule in an STM-tunneljunction with a magnetic tip and magnetic adatom on a Cu(111) surface from first-principle calculations. For the case of V tip/adatom, we demonstrate how spin-coupling between the magnetic V atoms mediated by the C60 can be observed in the electronic transport, which display a strong spin-filtering effect, allowing mainly majority-spin electrons to pass(>95%). Moreover, we find a significant change in the conductance between parallel and anti-parallel spin polarizations in the junction (86%) which suggests that STM experiments should be able to characterize the magnetism and spin-coupling for these systems.
@article{arxiv.1205.3881,
title = {Strong Spin-Filtering and Spin-Valve Effects in a Molecular V-C60-V Contact},
author = {Mohammad Koleini and Mads Brandbyge},
journal= {arXiv preprint arXiv:1205.3881},
year = {2013}
}