Bitte benutzen Sie diese Kennung, um auf die Ressource zu verweisen:
http://doi.org/10.25358/openscience-8115
Autoren: | Malottki, S. von Dupé, Bertrand Bessarab, Pavel F. Delin, Anna Heinze, Stefan |
Titel: | Enhanced skyrmion stability due to exchange frustration |
Online-Publikationsdatum: | 20-Okt-2022 |
Erscheinungsdatum: | 2017 |
Sprache des Dokuments: | Englisch |
Zusammenfassung/Abstract: | Skyrmions are localized, topologically non-trivial spin structures which have raised high hopes for future spintronic applications. A key issue is skyrmion stability with respect to annihilation into the ferromagnetic state. Energy barriers for this collapse have been calculated taking only nearest neighbor exchange interactions into account. Here, we demonstrate that exchange frustration can greatly enhance skyrmion stability. We focus on the prototypical film system Pd/Fe/Ir(111) and use an atomistic spin model parametrized from first-principles calculations. We show that energy barriers and critical fields of skyrmion collapse as well as skyrmion lifetimes are drastically enhanced due to frustrated exchange and that antiskyrmions are metastable. In contrast an effective nearest-neighbor exchange model can only account for equilibrium properties of skyrmions such as their magnetic field dependent profile or the zero temperature phase diagram. Our work shows that frustration of long range exchange interactions – a typical feature in itinerant electron magnets – is a route towards enhanced skyrmion stability even in systems with a ferromagnetic ground state. |
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-8115 |
Version: | Published version |
Publikationstyp: | Zeitschriftenaufsatz |
Nutzungsrechte: | CC BY |
Informationen zu den Nutzungsrechten: | https://creativecommons.org/licenses/by/4.0/ |
Zeitschrift: | Scientific reports 7 |
Seitenzahl oder Artikelnummer: | Art. 12299 |
Verlag: | Macmillan Publishers Limited, part of Springer Nature |
Verlagsort: | London |
Erscheinungsdatum: | 2017 |
ISSN: | 2045-2322 |
URL der Originalveröffentlichung: | http://dx.doi.org/10.1038/s41598-017-12525-x |
DOI der Originalveröffentlichung: | 10.1038/s41598-017-12525-x |
Enthalten in den Sammlungen: | DFG-OA-Publizieren (2012 - 2017) |
Dateien zu dieser Ressource:
Datei | Beschreibung | Größe | Format | ||
---|---|---|---|---|---|
enhanced_skyrmion_stability_d-20220925174847020.pdf | 1.94 MB | Adobe PDF | Öffnen/Anzeigen |