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  Observation of topological Hall effect in Mn2RhSn films

Rana, K. G., Meshcheriakova, O., Kübler, J., Ernst, B., Karel, J., Hillebrand, R., et al. (2016). Observation of topological Hall effect in Mn2RhSn films. New Journal of Physics, 18(8): 085007, pp. 1-7. doi:10.1088/1367-2630/18/8/085007.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-83D6-A Version Permalink: http://hdl.handle.net/21.11116/0000-0000-F79D-9
Genre: Journal Article

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 Creators:
Rana, K. G.1, Author              
Meshcheriakova, O.2, Author              
Kübler, J.3, Author
Ernst, B.2, Author              
Karel, J.4, Author              
Hillebrand, R.3, Author
Pippel, E.3, Author
Werner, P.3, Author
Nayak, A. K.5, Author              
Felser, C.6, Author              
Parkin, S. S. P.3, Author
Affiliations:
1Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3External Organizations, ou_persistent22              
4Julie Karel, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863434              
5Ajaya Nayak, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863426              
6Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: Recently non-collinear magnetic structures have attracted renewed attention due to the novel Hall effects that they display. In earlier work evidence for a non-collinear magnetic structure has been reported for the ferromagnetic Heusler compound Mn 2 RhSn. Using sputtering techniques we have prepared high quality epitaxial thin films of Mn 2 RhSn by high temperature growth on MgO (001) substrates. The films are tetragonally distorted with an easy magnetization axis along the c -axis. Moreover, we find evidence for an anomalous Hall effect whose magnitude increases strongly below the Curie temperature that is near room temperature. Consistent with theoretical calculations of the anomalous Hall conductivity that we have carried out by deriving the Berry curvature from the electronic structure of perfectly ordered Mn 2 RhSn, the sign of the anomalous Hall conductivity is negative, although the measured value is considerably smaller than the calculated value. We attribute this difference to small deviations in stoichiometry and chemical ordering. We also find evidence for a topological Hall resistivity of about 50 nΩ cm, which is ∼5 of the anomalous Hall effect, for temperatures below 100 K. The topological Hall effect signifies the presence of a chiral magnetic structure that evolves from the non-collinear magnetic structure that Mn 2 RhSn is known to exhibit.

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Language(s): eng - English
 Dates: 2016-08-122016-08-12
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1088/1367-2630/18/8/085007
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Title: New Journal of Physics
  Abbreviation : New J. Phys.
Source Genre: Journal
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Publ. Info: Bristol : IOP Publishing
Pages: - Volume / Issue: 18 (8) Sequence Number: 085007 Start / End Page: 1 - 7 Identifier: ISSN: 1367-2630
CoNE: /journals/resource/954926913666