Gradual pressure-induced change in the magnetic structure of the noncollinear 
antiferromagnet Mn3Ge

Sukhanov, A. S.; Singh, Sanjay; Caron, L.; Hansen, Th; Hoser, A.; Kumar, V.; Borrmann, H.; Fitch, A.; Devi, P.; Manna, K.; Felser, C.; Inosov, D. S.

doi:10.1103/PhysRevB.97.214402

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Gradual pressure-induced change in the magnetic structure of the noncollinear antiferromagnet Mn₃Ge

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Sukhanov, A. S.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons146743

Singh, Sanjay
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons182653

Caron, L.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons208892

Kumar, V.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126541

Borrmann, H.
Horst Borrmann, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons208866

Devi, P.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons201263

Manna, K.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126601

Felser, C.
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Sukhanov, A. S., Singh, S., Caron, L., Hansen, T., Hoser, A., Kumar, V., et al. (2018). Gradual pressure-induced change in the magnetic structure of the noncollinear antiferromagnet Mn₃Ge. Physical Review B, 97(21): 214402, pp. 1-7. doi:10.1103/PhysRevB.97.214402.

Cite as: https://hdl.handle.net/21.11116/0000-0001-93FD-C

Abstract

By means of powder neutron diffraction we investigate changes in the magnetic structure of the coplanar noncollinear antiferromagnet Mn3Ge caused by an application of hydrostatic pressure up to 5 GPa. At ambient conditions the kagome layers of Mn atoms in Mn3Ge order in a triangular 120 degrees spin structure. Under high pressure the spins acquire a uniform out-of-plane canting, gradually transforming the magnetic texture to a noncoplanar configuration. With increasing pressure the canted structure fully transforms into the collinear ferromagnetic one. We observed that magnetic order is accompanied by a noticeable magnetoelastic effect, namely, spontaneous magnetostriction. The latter induces an in-plane magnetostrain of the hexagonal unit cell at ambient pressure and flips to an out-of-plane strain at high pressures in accordance with the change of the magnetic structure.