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

Sürgers, Christoph 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)

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.

DOI: 10.1038/ncomms4400
Zitationen: 121
Web of Science
Zitationen: 118
Zitationen: 124
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
Web of Science
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