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arXiv · 1202.5173

Spin current and polarization reversal through a single-molecule magnet with ferromagnetic electrodes

Haiqing Xie·Qiang Wang·Bo Chang·Hujun Jiao·J. -Q. Liang
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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.

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Haiqing Xie, Qiang Wang, Bo Chang, Hujun Jiao, J. -Q. Liang. 2012-02-23. Spin current and polarization reversal through a single-molecule magnet with ferromagnetic electrodes. https://doi.org/10.1063/1.3694800

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