Thickness dependence of the anomalous Hall effect in thin films of the topological semimetal Co2MnGa
Markou A, Kriegner D, Gayles J, Zhang L, Chen YC, Ernst B, Lai YH, Schnelle W, Chu YH, Sun Y, Felser C (2019)
Publication Type: Journal article
Publication year: 2019
Journal
Book Volume: 100
Article Number: 054422
Journal Issue: 5
DOI: 10.1103/PhysRevB.100.054422
Abstract
Topological magnetic semimetals promise large Berry curvature through the distribution of the topological Weyl nodes or nodal lines and further novel physics with exotic transport phenomena. We present a systematic study of the structural and magnetotransport properties of Co2MnGa films from thin (20 nm) to bulklike behavior (80 nm) in order to understand the underlying mechanisms and the role of topology. The magnetron sputtered Co2MnGa films are L21-ordered showing very good heteroepitaxy and a strain-induced tetragonal distortion. The anomalous Hall conductivity was found to be maximum at a value of 1138 S/cm, with a corresponding anomalous Hall angle of 13%, which is comparatively larger than topologically trivial metals. There is good agreement between the theoretical calculations and the Hall conductivity observed for the 80 nm film, which suggests that the effect is intrinsic. Thus, the Co2MnGa compound manifests as a promising material for topologically driven spintronic applications.
Involved external institutions
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
National Chiao Tung University (NCTU) / 國立交通大學
Taiwan (TW)
Germany (DE)
National Chiao Tung University (NCTU) / 國立交通大學
Taiwan (TW)
How to cite
APA:
Markou, A., Kriegner, D., Gayles, J., Zhang, L., Chen, Y.-C., Ernst, B.,... Felser, C. (2019). Thickness dependence of the anomalous Hall effect in thin films of the topological semimetal Co2MnGa. Physical Review B, 100(5). https://doi.org/10.1103/PhysRevB.100.054422
MLA:
Markou, Anastasios, et al. "Thickness dependence of the anomalous Hall effect in thin films of the topological semimetal Co2MnGa." Physical Review B 100.5 (2019).
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