Effective attraction induced by repulsive interaction in a spin-transfer system
Abstract
In magnetic systems with dominating easy-plane anisotropy the magnetization can be described by an effective one dimensional equation for the in-plane angle. Re-deriving this equation in the presence of spin-transfer torques, we obtain a description that allows for a more intuitive understanding of spintronic devices' operation and can serve as a tool for finding new dynamic regimes. A surprising prediction is obtained for a planar ``spin-flip transistor'': an unstable equilibrium point can be stabilized by a current induced torque that further repels the system from that point. Stabilization by repulsion happens due to the presence of dissipative environment and requires a Gilbert damping constant that is large enough to ensure overdamped dynamics at zero current.
Keywords
Cite
@article{arxiv.0705.0508,
title = {Effective attraction induced by repulsive interaction in a spin-transfer system},
author = {Ya. B. Bazaliy},
journal= {arXiv preprint arXiv:0705.0508},
year = {2009}
}