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- Title
Magnetic Bloch oscillations and domain wall dynamics in a near-Ising ferromagnetic chain.
- Authors
Hansen, Ursula B.; Syljuåsen, Olav F.; Jensen, Jens; Schäffer, Turi K.; Andersen, Christopher R.; Boehm, Martin; Rodriguez-Rivera, Jose A.; Christensen, Niels B.; Lefmann, Kim
- 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. An electron subject to a periodic potential and a constant electric field exhibit oscillatory dynamics, known as Bloch oscillations. Here, the authors demonstrate a magnetic analogue of Bloch oscillations in a ferromagnetic near-Ising chain, where magnetic excitations oscillate in response to a magnetic field.
- Subjects
OSCILLATIONS; DOMAIN walls (Ferromagnetism); EXCITATION spectrum; INELASTIC neutron scattering; MAGNETIC fields; ELECTRIC fields
- Publication
Nature Communications, 2022, Vol 13, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-022-29854-9