arXiv subjects

Erlend Grytli Tveten

Publications and source records attributed to Erlend Grytli Tveten.

2 recordsLinked to original sources

arXiv2017

Equations of Motion and Frequency Dependence of Magnon-Induced Domain Wall Motion

Spin waves can induce domain wall motion in ferromagnets. We derive the equations of motion for a transverse domain wall driven by spin waves. Our calculations show that the magnonic spin-transfer torque does not cause rotation-induced Walker breakdown. The amplitude of spin waves that are excited by a localized microwave field depends on the spatial profile of the field and the excitation frequency. By taking this frequency dependence into account, we show that a simple one-dimensional model may reproduce much of the puzzling frequency dependence observed in early numerical studies.

cond-mat.mes-hall↗

arXiv2014

Antiferromagnetic Domain Wall Motion Induced by Spin Waves

Spin waves in antiferromagnets are linearly or circularly polarized. Depending on the polarization, traversing spin waves alter the staggered field in a qualitatively different way. We calculate the drift velocity of a moving domain wall as a result of spin wave mediated forces, and show that the domain wall moves in opposite directions for linearly and circularly polarized waves. The analytical results agree with a micromagnetics simulation of an antiferromagnetic domain wall driven by a localized and alternating magnetic field.

cond-mat.mes-hall↗