KIT | KIT-Bibliothek | Impressum | Datenschutz

Large topological Hall effect in the non-collinear phase of an antiferromagnet

Sürgers, Christoph ORCID iD icon 1,2; Fischer, Gerda 1; Winkel, Patrick 1; Löhneysen, Hilbert von 1,2,3
1 Physikalisches Institut (PHI), Karlsruher Institut für Technologie (KIT)
2 Center for Functional Nanostructures (CFN), Karlsruher Institut für Technologie (KIT)
3 Institut für Festkörperphysik (IFP), Karlsruher Institut für Technologie (KIT)

Abstract:

Non-trivial spin arrangements in magnetic materials give rise to the topological Hall effect observed in compounds with a non-centrosymmetric cubic structure hosting a skyrmion lattice, in double-exchange ferromagnets and magnetically frustrated systems. The topological Hall effect has been proposed to appear also in presence of non-coplanar spin configurations and thus might occur in an antiferromagnetic material with a highly non-collinear and non-coplanar spin structure. Particularly interesting is a material where the non-collinearity develops not immediately at the onset of antiferromagnetic order but deep in the antiferromagnetic phase. This unusual situation arises in non-cubic antiferromagnetic Mn5Si3. Here we show that a large topological Hall effect develops well below the N{\'e}el temperature as soon as the spin arrangement changes from collinear to non-collinear with decreasing temperature. We further demonstrate that the effect is not observed when the material is turned ferromagnetic by carbon doping without changing its crystal structure.

Zugehörige Institution(en) am KIT Institut für Festkörperphysik (IFP)
Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2014
Sprache Englisch
Identifikator ISSN: 2041-1723
KITopen-ID: 1000050391
HGF-Programm 43.11.01 (POF II, LK 01) Condensed matter
Erschienen in Nature Communications
Verlag Nature Research
Band 5
Seiten Art.Nr. 3400
Nachgewiesen in Dimensions
Scopus
Web of Science

Download
Originalveröffentlichung
DOI: 10.1038/ncomms4400
Scopus
Zitationen: 191
Web of Science
Zitationen: 174
Dimensions
Zitationen: 208
Seitenaufrufe: 208
seit 04.05.2018
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page