Autoren:	Lozhkina, Olga Reeve, Robert M. Frömter, Robert Kläui, Mathias
Titel:	Control of the Walker breakdown by periodical magnetic wire-width modulation
Online-Publikationsdatum:	10-Aug-2022
Erscheinungsdatum:	2022
Sprache des Dokuments:	Englisch
Zusammenfassung/Abstract:	Suppression of the Walker breakdown in confined wires is key to improving the operation and reliability of magnetic domain-wall-based devices, including logic, memory, and sensor applications. Here, via micromagnetic simulations, we demonstrate that periodical wire-width modulation with suitable geometric parameters can fully suppress the Walker breakdown of a field-driven domain wall, conserving its spin structure in the whole operating field range of a device. Key differences in the efficacy of the wire-width modulation are observed for wires with different widths and thicknesses such that different domain wall states are energetically stable. In particular, the approach is found to be effective in expanding the field-operating window of a device in the case of smaller wire widths and thicknesses (below 150 nm wide and 15 nm thick), whereas in larger wires, the advantages from the suppression in the Walker breakdown are counteracted by the increase in domain wall pinning and the reduction in the nucleation field for new domain walls. Simulations on intersecting magnetic wires prove the importance of suppression of the Walker breakdown. Since the domain wall behavior is chirality dependent, introducing periodical wire-width modulation conserves the spin structure, thus reducing stochasticity of the domain wall propagation.
DDC-Sachgruppe:	530 Physik 530 Physics
Veröffentlichende Institution:	Johannes Gutenberg-Universität Mainz
Organisationseinheit:	FB 08 Physik, Mathematik u. Informatik
Veröffentlichungsort:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-7469
Version:	Accepted version
Publikationstyp:	Zeitschriftenaufsatz
Weitere Angaben zur Dokumentart:	Scientific article
Nutzungsrechte:	Urheberrechtsschutz
Informationen zu den Nutzungsrechten:	http://rightsstatements.org/vocab/InC/1.0/
Zeitschrift:	Journal of applied physics 131 23
Seitenzahl oder Artikelnummer:	233902
Verlag:	American Inst. of Physics
Verlagsort:	Melville, NY
Erscheinungsdatum:	2022
ISSN:	0021-8979
DOI der Originalveröffentlichung:	10.1063/5.0092222
Enthalten in den Sammlungen:	JGU-Publikationen