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Magnetic Bloch oscillations and domain wall dynamics in a near-Ising ferromagnetic chain.

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.

SUBMITTER: Hansen UB

PROVIDER: S-EPMC9090816 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature

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Magnetic Bloch oscillations and domain wall dynamics in a near-Ising ferromagnetic chain.

Hansen Ursula B UB Syljuåsen Olav F OF Jensen Jens J Schäffer Turi K TK Andersen Christopher R CR Boehm Martin M Rodriguez-Rivera Jose A JA Christensen Niels B NB Lefmann Kim K

Nature communications 20220510 1

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. Usin ...[more]

PMID: 35538071

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