Propagation of solitons of the magnetization in magnetic nano-particle arrays

TL;DR

This paper demonstrates the stable creation and high-speed propagation of magnetic solitons in nano-particle arrays, controlled by dipolar interactions and shape anisotropy, with potential applications in signal transmission.

Contribution

First demonstration of stable magnetic solitons in nano-particle arrays, showing controllability and high-speed propagation for potential nano-scale communication devices.

Findings

Solitons are stably created via dipolar interactions.

Propagation speed exceeds 100 GHz in suitable materials.

Array configurations can be tuned for signal transmission applications.

Abstract

It is clarified for the first time that solitons originating from the dipolar interaction in ferromagnetic nano-particle arrays are stably created. The characteristics can be well controlled by the strength of the dipolar interaction between particles and the shape anisotropy of the particle. The soliton can propagate from a particle to a neighbor particle at a clock frequency even faster than 100 GHz using materials with a large magnetization. Such arrays of nano-particles might be feasible in an application as a signal transmission line.