Publikation:

Domain walls, domain wall transformations and structural changes in permalloy nanowires when subjected to current pulses

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2007_pss_Domain.pdf
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2007

Autor:innen

Hempe, Eva-Maria
Kasama, Takeshi
Backes, Dirk
Heyderman, Laura J.
Dunin-Borkowski, Rafal E.

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http://nbn-resolving.de/urn:nbn:de:bsz:352-144467
DOI (zitierfähiger Link)
https://doi.org/10.1002/pssa.200777193
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Physik: Publikationen
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Published

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physica status solidi (a). 2007, 204(12), pp. 3922-3928. ISSN 1862-6300. Available under: doi: 10.1002/pssa.200777193

Zusammenfassung

We report the direct transmission electron microscopy observation of spin structure transformations in nanoscale Permalloy zigzag wires due to Joule heating during the injection of current pulses. This heating is sufficient to overcome the energy barriers separating the different metastable domain wall spin structures. Due to the large energy barriers these are stable and observable at room temperature by off-axis electron holography and Fresnel imaging. The interaction between different domain walls is probed and the main pinning mechanism is determined to be the edge roughness. In addition to transformations, we also report on thermally assisted domain wall hopping between two pinning sites and structural changes that occur when the samples are subjected to even higher current pulses.

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530 Physik

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ISO 690HEMPE, Eva-Maria, Mathias KLÄUI, Takeshi KASAMA, Dirk BACKES, Friederike JUNGINGER, Stephen KRZYK, Laura J. HEYDERMAN, Ulrich RÜDIGER, Rafal E. DUNIN-BORKOWSKI, 2007. Domain walls, domain wall transformations and structural changes in permalloy nanowires when subjected to current pulses. In: physica status solidi (a). 2007, 204(12), pp. 3922-3928. ISSN 1862-6300. Available under: doi: 10.1002/pssa.200777193
BibTex
@article{Hempe2007Domai-14446,
  year={2007},
  doi={10.1002/pssa.200777193},
  title={Domain walls, domain wall transformations and structural changes in permalloy nanowires when subjected to current pulses},
  number={12},
  volume={204},
  issn={1862-6300},
  journal={physica status solidi (a)},
  pages={3922--3928},
  author={Hempe, Eva-Maria and Kläui, Mathias and Kasama, Takeshi and Backes, Dirk and Junginger, Friederike and Krzyk, Stephen and Heyderman, Laura J. and Rüdiger, Ulrich and Dunin-Borkowski, Rafal E.}
}
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