Cubic Mn3Ge thin films stabilized through epitaxial growth as a candidate 
noncollinear antiferromagnet

Markou, Anastasios; Taylor, James M.; Gayles, Jacob; Sun, Yan; Kriegner, Dominik; Grenzer, Joerg; Guo, Shanshan; Schnelle, Walter; Lesne, Edouard; Felser, Claudia; Parkin, Stuart S. P.

doi:10.1063/5.0206194

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Cubic Mn₃Ge thin films stabilized through epitaxial growth as a candidate noncollinear antiferromagnet

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Taylor, James M.
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Parkin, Stuart S. P.
Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society;

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Citation

Markou, A., Taylor, J. M., Gayles, J., Sun, Y., Kriegner, D., Grenzer, J., et al. (2024). Cubic Mn₃Ge thin films stabilized through epitaxial growth as a candidate noncollinear antiferromagnet. Applied Physics Letters, 125(2): 022402. doi:10.1063/5.0206194.

Cite as: https://hdl.handle.net/21.11116/0000-000F-A316-0

Abstract

Metallic antiferromagnets with chiral spin textures induce Berry curvature-driven anomalous and spin Hall effects that arise from the topological structure of their electronic bands. Here, we use epitaxial engineering to stabilize (111)-oriented thin films of Mn</sub>3</sub>Ge with a cubic phase. This cubic phase is distinct from tetragonal ferrimagnetic and hexagonal noncollinear antiferromagnetic structures with the same chemical composition. First-principles calculations indicate that cubic Mn3Ge will preferentially form an all-in/all-out triangular spin texture. We present evidence for this noncollinear antiferromagnetism through magnetization measurements with a Néel temperature of 490 K. First-principles calculations of the corresponding band structure indicate the presence of Weyl points. These highlight cubic Mn3Ge as a candidate material for topological antiferromagnetic spintronics.