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Enhanced Nonadiabaticity in Vortex Cores due to the Emergent Hall Effect

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2016

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Bisig, André
Akosa, Collins Ashu
Moon, Jung-Hwan
Rhensius, Jan
von Bieren, Arndt
Heidler, Jakoba
Kammerer, Matthias
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https://doi.org/10.1103/PhysRevLett.117.277203
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http://arxiv.org/abs/1511.06585

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Physical Review Letters. 2016, 117(27), 277203. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.117.277203

Zusammenfassung

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.

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ISO 690BISIG, André, Collins Ashu AKOSA, Jung-Hwan MOON, Jan RHENSIUS, Christoforos MOUTAFIS, Arndt VON BIEREN, Jakoba HEIDLER, Gillian KILIANI, Matthias KAMMERER, Mathias KLÄUI, 2016. Enhanced Nonadiabaticity in Vortex Cores due to the Emergent Hall Effect. In: Physical Review Letters. 2016, 117(27), 277203. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.117.277203
BibTex
@article{Bisig2016Enhan-37881,
  year={2016},
  doi={10.1103/PhysRevLett.117.277203},
  title={Enhanced Nonadiabaticity in Vortex Cores due to the Emergent Hall Effect},
  number={27},
  volume={117},
  issn={0031-9007},
  journal={Physical Review Letters},
  author={Bisig, André and Akosa, Collins Ashu and Moon, Jung-Hwan and Rhensius, Jan and Moutafis, Christoforos and von Bieren, Arndt and Heidler, Jakoba and Kiliani, Gillian and Kammerer, Matthias and Kläui, Mathias},
  note={Article Number: 277203}
}
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