Enhanced Non-Adiabaticity in Vortex Cores due to the Emergent Hall Effect
Abstract
We present a combined theoretical and experimental study, investigating the origin of the enhanced non-adiabaticity of magnetic vortex cores. Scanning transmission X-ray microscopy is used to image the vortex core gyration dynamically to measure the non-adiabaticity with high precision, including a high confidence upper bound. Using both numerical computations and analytical derivations, we show that the large non-adiabaticity parameter observed experimentally can be explained by the presence of local spin currents arising from a texture-induced emergent Hall effect. This enhanced non-adiabaticity is only present in two- and three-dimensional magnetic textures such as vortices and skyrmions and absent in one-dimensional domain walls, in agreement with experimental observations.
Keywords
Cite
@article{arxiv.1511.06585,
title = {Enhanced Non-Adiabaticity in Vortex Cores due to the Emergent Hall Effect},
author = {André Bisig and Collins Ashu Akosa and Jung-Hwan Moon and Jan Rhensius and Christoforos Moutafis and Arndt von Bieren and Jakoba Heidler and Gillian Kiliani and Matthias Kammerer and Michael Curcic and Markus Weigand and Tolek Tyliszczak and Bartel Van Waeyenberge and Hermann Stoll and Gisela Schütz and Kyung-Jin Lee and Aurelien Manchon and Mathias Kläui},
journal= {arXiv preprint arXiv:1511.06585},
year = {2017}
}
Comments
6 pages, 3 figures