Eur. Phys. J. B 72, 423-426 (2009)
https://doi.org/10.1140/epjb/e2009-00371-4

Spin-dependent transport in organic-ferromagnets

Department of Applied Physics, National University of Kaohsiung, Kaohsiung 811, Taiwan, China

Corresponding author: ^a sjs@nuk.edu.tw

Received: 17 March 2009
Revised: 15 September 2009
Published online: 3 November 2009

Abstract

Based on the modified Su-Schrieffer-Heeger model and the non-equilibrium Green's function current formula, the spin polarization of the ferromagnet-electrode connected organic ferromagnet is theoretically studied. The spin polarization can be suppressed by atomic dimerization and be driven by an applied electric field. We investigate the spin polarization from the viewpoint of energy competitions in different interactions under the electric field. In addition, the ferromagnetic electrodes significantly enhance the spin polarization.