Spin current and polarization reversal through a single-molecule magnet with ferromagnetic electrodes
Abstract
We theoretically study the spin-polarized transport through a single-molecule magnet, which is weakly coupled to ferromagnetic leads, by means of the rate-equation approach. We consider both the ferromagnetic and antiferromagnetic exchange-couplings between the molecular magnet and transported electron-spin in the nonlinear tunneling regime. For the ferromagnetic exchangecoupling, spin current exhibits step- and basin-like behaviors in the parallel and antiparallel configurations respectively. An interesting observation is that the polarization reversal of spin-current can be realized and manipulated by the variation of bias voltage in the case of antiferromagnetic exchange-coupling with antiparallel lead-configuration, which may be useful in the development of spintronic devices, while the bias voltage can only affect the magnitude of spin-polarization in the ferromagnetic coupling.
Cite
@article{arxiv.1202.5173,
title = {Spin current and polarization reversal through a single-molecule magnet with ferromagnetic electrodes},
author = {Haiqing Xie and Qiang Wang and Bo Chang and Hujun Jiao and J. -Q. Liang},
journal= {arXiv preprint arXiv:1202.5173},
year = {2012}
}