Magnetic Bloch oscillations and domain wall dynamics in a near-Ising ferromagnetic chain.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 35538071.
- Also identified by DOI 10.1038/s41467-022-29854-9 and PMC identifier 9090816.
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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 ferromagnetic easy axis chain. In this case, the "particles" undergoing oscillatory motion in the presence of a magnetic field are domain walls. 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.