Observation of a topologically protected state in a magnetic domain wall stabilized by a ferromagnetic chemical barrier
Ruiz-Gómez, Sandra (Universidad Complutense de Madrid. Departamento de Física de Materiales)
Foerster, Michael (ALBA Laboratori de Llum de Sincrotró)
Aballe, Lucía (ALBA Laboratori de Llum de Sincrotró)
Proença, Mariana P. (Universidade do Porto)
Lucas del Pozo, Irene (Universidad de Zaragoza)
Prieto, José Luis (Universidad Politécnica de Madrid)
Mascaraque, Arantzazu (Universidad Complutense de Madrid)
Figuera, Juan de la (Instituto de Química Física "Rocasolano")
Quesada, Adrian (Instituto de Cerámica y Vidrio (CSIC))
Pérez, Lucas (Universidad Complutense de Madrid)

Date:	2018
Abstract:	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.
Grants:	Ministerio de Economía y Competitividad MAT2014-52477-C5-1-P Ministerio de Economía y Competitividad MAT2014-52477-C5-2-P Ministerio de Economía y Competitividad MAT2015-64110-C2-1-P Ministerio de Economía y Competitividad MAT2015-64110-C2-2-P Ministerio de Economía y Competitividad MAT2017-87072-C4-2-P Ministerio de Economía y Competitividad SEV-2016-0686
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Scientific reports, Vol. 8 (November 2018) , art. 16695, ISSN 2045-2322

DOI: 10.1038/s41598-018-35039-6
PMID: 30420675

6 p, 1.4 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > The ALBA Synchrotron
Articles > Research articles
Articles > Published articles