# Magnetic Bloch Oscillations and domain wall dynamics in a near-Ising ferromagnetic chain

## TL;DR

This paper demonstrates magnetic Bloch oscillations in a one-dimensional ferromagnetic chain, revealing domain wall dynamics and providing theoretical explanations for observed spin-dynamics features.

## Contribution

It introduces the experimental observation of magnetic Bloch oscillations in a ferromagnetic chain and offers a parameter-free theoretical model to explain the spin-dynamics spectrum.

## Key findings

- Observation of a signature Bloch oscillation mode
- Identification of three components in low energy spin-dynamics
- Theoretical model accurately explains excitation spectrum

## Abstract

When charged particles in periodic lattices are subjected to a constant electric field, they respond by oscillating. Here we demonstrate that the magnetic analogue of these Bloch oscillations are realised in a one-dimensional ferromagnetic easy axis chain. In this case, the "particle" undergoing oscillatory motion in the presence of a magnetic field is a domain wall. Inelastic neutron scattering reveals three distinct components of the low energy spin-dynamics including a signature Bloch oscillation mode. Using parameter-free theoretical calculations, we are able to account for all features in the excitation spectrum, thus providing detailed insights into the complex dynamics in spin-anisotropic chains.