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  Hard magnet topological semimetals in XPt3 compounds with the harmony of Berry curvature

Markou, A., Gayles, J., Derunova, E., Swekis, P., Noky, J., Zhang, L., et al. (2021). Hard magnet topological semimetals in XPt3 compounds with the harmony of Berry curvature. Communications Physics, 4: 104, pp. 1-7. doi:10.1038/s42005-021-00608-1.

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Markou, Anastasios1, Author              
Gayles, Jacob1, Author              
Derunova, Elena2, Author
Swekis, Peter1, Author              
Noky, Jonathan1, Author              
Zhang, Liguo1, Author              
Ali, Mazhar N.2, Author
Sun, Yan1, Author              
Felser, Claudia3, Author              
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1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2External Organizations, ou_persistent22              
3Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863429              

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 Abstract: Topological magnetic semimetals, like Co3Sn2S2 and Co2MnGa, display exotic transport properties, such as large intrinsic anomalous (AHE) due to uncompensated Berry curvature. The highly symmetric XPt3 compounds exhibit anti-crossing gapped nodal lines, a driving mechanism in the intrinsic Berry curvature Hall effects. Uniquely, these compounds contain two sets of gapped nodal lines that harmoniously dominate the Berry curvature in this complex multi band system. We calculate a maximum AHE of 1965 S cm-1 in the CrPt3 by first principles electronic structure. We have grown high-quality CrPt3 thin films with perpendicular magnetic anisotropy by magnetron sputtering and measured a robust AHE of 1750 S cm−1 for different sputtering growth conditions. Additionally, the cubic films display an easy magnetic axis along [111] direction. The facile and scalable fabrication of these materials is prime candidates for integration into topological devices.

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 Dates: 2021-05-212021-05-21
 Publication Status: Published in print
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 Identifiers: DOI: 10.1038/s42005-021-00608-1
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Title: Communications Physics
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 4 Sequence Number: 104 Start / End Page: 1 - 7 Identifier: ISSN: 2399-3650
CoNE: https://pure.mpg.de/cone/journals/resource/2399-3650