Magnetization reversal through synchronization with a microwave

TL;DR

This paper demonstrates that a circularly-polarized microwave can efficiently reverse magnetization in a Stoner particle by synchronization, requiring a smaller switching field than traditional static magnetic field methods.

Contribution

It introduces a novel magnetization reversal mechanism using microwave synchronization, reducing the required switching field compared to static magnetic field approaches.

Findings

Microwave-induced reversal requires lower switching fields.

Synchronization enables efficient magnetization switching.

Energy dissipation is the key factor for reversal.

Abstract

Based on the Landau-Lifshitz-Gilbert equation, it can be shown that a circularly-polarized microwave can reverse the magnetization of a Stoner particle through synchronization. In comparison with magnetization reversal induced by a static magnetic field, it can be shown that when a proper microwave frequency is used the minimal switching field is much smaller than that of precessional magnetization reversal. A microwave needs only to overcome the energy dissipation of a Stoner particle in order to reverse magnetization unlike the conventional method with a static magnetic field where the switching field must be of the order of magnetic anisotropy.