dc.contributor |
Háskóli Íslands |
dc.contributor |
University of Iceland |
dc.contributor.author |
von Malottki, S. |
dc.contributor.author |
Dupé, B. |
dc.contributor.author |
Bessarab, Pavel |
dc.contributor.author |
Delin, A. |
dc.contributor.author |
Heinze, S. |
dc.date.accessioned |
2018-01-31T10:49:20Z |
dc.date.available |
2018-01-31T10:49:20Z |
dc.date.issued |
2017-09-26 |
dc.identifier.citation |
von Malottki, S., Dupé, B., Bessarab, P. F., Delin, A., & Heinze, S. (2017). Enhanced skyrmion stability due to exchange frustration. Scientific Reports, 7(1), 12299. doi:10.1038/s41598-017-12525-x |
dc.identifier.issn |
2045-2322 |
dc.identifier.uri |
https://hdl.handle.net/20.500.11815/552 |
dc.description.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. |
dc.description.sponsorship |
We gratefully acknowledge computing time at the supercomputer of the North-German Supercomputing Alliance (HLRN). This project has received funding from the European Unions Horizon 2020 research and innovation programme under grant agreement No. 665095 (FET-Open project MAGicSky). P.F.B. acknowledges support from the Icelandic Research Fund (Grant No. 163048-052) and the mega-grant of the Ministry of Education and Science of the Russian Federation (grant no. 14.Y26.31.0015). B.D. thanks the Deutsche Forschungsgemeinschaft for funding within the project DU1489/2-1. A.D. acknowledges financial support from Swedish e-science Research Centre (SeRC), Vetenskapsrådet (grant numbers VR 2015-04608 and VR 2016-05980), and Swedish Energy Agency (grant number STEM P40147-1). Some of the computations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC) at the National Supercomputer Center (NSC), Linköping University, the PDC Centre for High Performance Computing (PDC-HPC), KTH, and the High Performance Computing Center North (HPC2N), Umeå University. |
dc.format.extent |
12299 |
dc.language.iso |
en |
dc.publisher |
Springer Nature |
dc.relation |
"info:eu-repo/grantAgreement/EC/H2020/665095" |
dc.relation.ispartofseries |
Scientific Reports;7(1) |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.subject |
Magnetic properties and materials |
dc.subject |
Spintronics |
dc.subject |
Eðlisfræði |
dc.subject |
Segulmagn |
dc.subject |
Aflfræði |
dc.subject |
Hreyfifræði |
dc.title |
Enhanced skyrmion stability due to exchange frustration |
dc.type |
info:eu-repo/semantics/article |
dcterms.license |
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
dc.description.version |
Peer Reviewed |
dc.identifier.journal |
Scientific Reports |
dc.identifier.doi |
10.1038/s41598-017-12525-x |
dc.contributor.department |
Raunvísindastofnun (HÍ) |
dc.contributor.department |
Science Institute (UI) |
dc.contributor.school |
Verkfræði- og náttúruvísindasvið (HÍ) |
dc.contributor.school |
School of Engineering and Natural Sciences (UI) |