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arXiv · 1802.03256

Antiferromagnetic ground state in the MnGa$_4$ intermetallic compound

V. Yu. Verchenko·A. A. Tsirlin·D. Kasinathan·S. V. Zhurenko·A. A. Gippius·A. V. Shevelkov
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Abstract

Magnetism of the binary intermetallic compound MnGa$_4$ is re-investigated. Band-structure calculations predict antiferromagnetic behavior in contrast to Pauli paramagnetism reported previously. Magnetic susceptibility measurements on single crystals indeed reveal an antiferromagnetic transition at $T_N=393$ K. Neutron powder diffraction and $^{69,71}$Ga nuclear quadrupole resonance spectroscopy show collinear antiferromagnetic order with magnetic moments alligned along the [111] direction of the cubic unit cell. The magnetic moment of 0.80(3)$\mu_B$ at 1.5 K extracted from the neutron data is in good agreement with the band-structure results.

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V. Yu. Verchenko, A. A. Tsirlin, D. Kasinathan, S. V. Zhurenko, A. A. Gippius, A. V. Shevelkov. 2018-02-09. Antiferromagnetic ground state in the MnGa$_4$ intermetallic compound. https://doi.org/10.1103/physrevmaterials.2.044408

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