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Dynamic domain wall chirality rectification by rotating magnetic fields

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2015

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Bisig, Andre
Mawass, Mohamad-Assaad
Rhensius, Jan
Heidler, Jakoba
Gliga, Sebastian
Weigand, Markus
Tyliszczak, Tolek
Van Waeyenberge, Bartel
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https://doi.org/10.1063/1.4915256
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Applied Physics Letters. 2015, 106(12), 122401. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.4915256

Zusammenfassung

We report on the observation of magnetic vortex domain wall chirality reversal in ferromagnetic rings that is controlled by the sense of rotation of a magnetic field. We use time-resolved X-ray microscopy to dynamically image the chirality-switching process and perform micromagnetic simulations to deduce the switching details from time-resolved snapshots. We find experimentally that the switching occurs within less than 4 ns and is observed in all samples with ring widths ranging from 0.5 μm to 2 μm, ring diameters between 2 μm and 5 μm, and a thickness of 30 nm, where a vortex domain wall is present in the magnetic onion state of the ring. From the magnetic contrast in the time-resolved images, we can identify effects of thermal activation, which plays a role for the switching process. Moreover, we find that the process is highly reproducible so that the domain wall chirality can be set with high fidelity.

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530 Physik

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Domain walls, Rotating flows, Chiral symmetries, Magnetic fields, Time resolved imaging

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ISO 690BISIG, Andre, Mohamad-Assaad MAWASS, Martin STÄRK, Christoforos MOUTAFIS, Jan RHENSIUS, Jakoba HEIDLER, Sebastian GLIGA, Markus WEIGAND, Tolek TYLISZCZAK, Bartel VAN WAEYENBERGE, Hermann STOLL, Gisela SCHÜTZ, Mathias KLÄUI, 2015. Dynamic domain wall chirality rectification by rotating magnetic fields. In: Applied Physics Letters. 2015, 106(12), 122401. ISSN 0003-6951. eISSN 1077-3118. Available under: doi: 10.1063/1.4915256
BibTex
@article{Bisig2015Dynam-31276,
  year={2015},
  doi={10.1063/1.4915256},
  title={Dynamic domain wall chirality rectification by rotating magnetic fields},
  number={12},
  volume={106},
  issn={0003-6951},
  journal={Applied Physics Letters},
  author={Bisig, Andre and Mawass, Mohamad-Assaad and Stärk, Martin and Moutafis, Christoforos and Rhensius, Jan and Heidler, Jakoba and Gliga, Sebastian and Weigand, Markus and Tyliszczak, Tolek and Van Waeyenberge, Bartel and Stoll, Hermann and Schütz, Gisela and Kläui, Mathias},
  note={Article Number: 122401}
}
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