Current driven magnetization dynamics in helical spin density waves

TL;DR

This paper proposes a current-driven method to manipulate the magnetic state of helical spin density waves via spin transfer torque, offering a bulk system alternative to interface-based techniques, demonstrated through calculations on Erbium.

Contribution

It introduces a novel mechanism for controlling helical spin density waves using current-induced spin transfer torque in bulk materials.

Findings

Current induces magnetization rotation in helical spin density waves.

Bulk systems avoid obstacles faced by multilayered systems.

Quantitative analysis demonstrated in Erbium.

Abstract

A mechanism is proposed for manipulating the magnetic state of a helical spin density wave using a current. In this paper, we show that a current through a bulk system with a helical spin density wave induces a spin transfer torque, giving rise to a rotation of the order parameter.The use of spin transfer torque to manipulate the magnetization in bulk systems does not suffer from the obstacles seen for magnetization reversal using interface spin transfer torque in multilayered systems. We demonstrate the effect by a quantitative calculation of the current induced magnetization dynamics of Erbium. Finally we propose a setup for experimental verification.