Fast magnetization reversal of nanoclusters in resonator

TL;DR

This paper proposes a method for ultrafast magnetization reversal in nanoclusters by coupling them to a resonant circuit, significantly reducing reversal time through magnetic feedback effects.

Contribution

It introduces a novel approach using resonator coupling to achieve rapid magnetization reversal in nanoclusters, applicable to single and interacting clusters.

Findings

Reversal time can be reduced by several orders of magnitude.

Resonator properties significantly influence reversal dynamics.

Method effective for both single and interacting nanoclusters.

Abstract

An effective method for ultrafast magnetization reversal of nanoclusters is suggested. The method is based on coupling a nanocluster to a resonant electric circuit. This coupling causes the appearance of a magnetic feedback field acting on the cluster, which drastically shortens the magnetization reversal time. The influence of the resonator properties, nanocluster parameters, and external fields on the magnetization dynamics and reversal time is analyzed. The magnetization reversal time can be made many orders shorter than the natural relaxation time. The reversal is studied for both the cases of a single nanocluster as well as for the system of many nanoclusters interacting through dipole forces.