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Antiferromagnetic ground state in the MnGa$_4$ intermetallic compound

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arxiv 1802.03256 v2 pith:MEIZEZDI submitted 2018-02-09 cond-mat.mtrl-sci

V.Yu. Verchenko , A.A. Tsirlin , D. Kasinathan , S.V. Zhurenko , A.A. Gippius , A.V. Shevelkov This is my paper · ORCID
classification cond-mat.mtrl-sci
keywords antiferromagneticmagneticband-structurecompoundintermetallicmnganeutronagreement
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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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