Electric-Driven Magnetization Dynamics of Multilayer Nanostructures

Abstract

The electric-driven magnetization dynamics in multilayer magnetic nanostructures with strong spin–orbit coupling has been investigated. Controlled changes of magnetization occur via a spin polarization with conversation of the input charge current into the spin current, which coupled with the background magnetization by an exchange interaction. Generally, such the conversation in the spin current is related to the spin splitting in the internal effective bias field of the different nature, which can be formed both by the internal field of the exchange interaction and by the effective bias field of the spin–orbit interaction. The magnetization dynamics is derived in the framework of the Schrodinger Hamiltonian with the relativistic spin–orbit correction. The impact of the spin–orbit interaction on the magnetization occurs via the action of corresponding torque, the so-called field-like part of which gives rise to the magnetization switching and the damping-like part exerts on the magnetization precession.