One dimensional gapless magnons in a single anisotropic ferromagnetic nanolayer

TL;DR

This paper demonstrates the existence of one-dimensional, gapless magnons localized within domain walls in an anisotropic ferromagnetic nanolayer, which could significantly influence low-temperature spin transport phenomena.

Contribution

It reveals the presence of gapless, one-dimensional magnons confined to domain walls in a ferromagnetic nanolayer, a novel finding in spin wave physics.

Findings

Gapless magnons are localized inside domain walls.

These magnons exist alongside gapped modes.

They may impact spin-dependent scattering at low temperatures.

Abstract

Gapless magnons in a plane ferromagnet with normal axis anisotropy are shown to exist besides the usual gapped modes that affect spin dependent transport properties only above a finite temperature. These magnons are one dimensional objects, in the sense that they are localized inside the domain walls that form in the film. They may play an essential role in the spin dependent scattering processes even down to very low temperatures.