Observation of a topologically protected state in a magnetic domain wall stabilized by a ferromagnetic chemical barrier

The precise control and stabilization of magnetic domain walls is key for the development of the next generation magnetic nano-devices. Among the multitude of magnetic configurations of a magnetic domain wall, topologically protected states are of particular interest due to their intrinsic stability...

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Bibliographic Details
Published in:Scientific reports 2018-11, Vol.8 (1), p.16695-6, Article 16695
Main Authors: Ruiz-Gómez, Sandra, Foerster, Michael, Aballe, Lucia, Proenca, Mariana P., Lucas, Irene, Prieto, José Luis, Mascaraque, Arantzazu, de la Figuera, Juan, Quesada, Adrián, Pérez, Lucas
Format: Article
Language:English
Subjects:
140/146
639/301/357/1016
639/301/357/997
639/925/927/1062
Humanities and Social Sciences
multidisciplinary
Nanotechnology
Nanowires
Oscillators
Science
Science (multidisciplinary)
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Summary:The precise control and stabilization of magnetic domain walls is key for the development of the next generation magnetic nano-devices. Among the multitude of magnetic configurations of a magnetic domain wall, topologically protected states are of particular interest due to their intrinsic stability. In this work, using XMCD-PEEM, we have observed a topologically protected magnetic domain wall in a ferromagnetic cylindrical nanowire. Its structure is stabilized by periodic sharp alterations of the chemical composition in the nanowire. The large stability of this topologically protected domain wall contrasts with the mobility of other non-protected and non-chiral states also present in the same nanowire. The micromagnetic simulations show the structure and the conditions required to find the topologically protected state. These results are relevant for the design of future spintronic devices such as domain wall based RF oscillators or magnetic memories.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-35039-6