Zero-field magnetic ground state of EuMg${}_2$Bi${}_2$

Abstract

Layered trigonal EuMg${}_2$Bi${}_2$ is reported to be a topological semimetal that hosts multiple Dirac points that may be gapped or split by the onset of magnetic order. Here, we report zero-field single-crystal neutron-diffraction and bulk magnetic susceptibility measurements versus temperature $\chi (T)$ of EuMg${}_2$Bi${}_2$ that show the intraplane ordering is ferromagnetic (Eu${}^{2+},S=7/2$) with the moments aligned in the $ab$-plane while adjacent layers are aligned antiferromagnetically (i.e., A-type antiferromagnetism) below the Néel temperature.

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Cited by in corpus (12)

• A-type antiferromagnetic order and magnetic phase diagram of the trigonal Eu spin-7/2 triangular-lattice compound EuSn2As2
• A-type antiferromagnetic order in semiconducting EuMg${}_2$Sb${}_2$ single crystals
• Anisotropic magnetism and electronic structure of trigonal EuAl${}_2$Ge${}_2$ single crystals
• Superexchange Interaction in Insulating EuZn${}_2$P${}_2$
• Magnetic-field-induced ab-plane rotation of the Eu magnetic moments in trigonal EuMg2Bi2 and EuMg2Sb2 single crystals below their Neel temperatures
• Electronic and magnetic properties of the topological semimetal SmMg${}_2$Bi${}_2$
• Field-tunable Weyl points and large anomalous Hall effects in degenerate magnetic semiconductor EuMg${}_2$Bi${}_2$
• Low-field magnetic anomalies in single crystals of the A-type square-lattice antiferromagnet EuGa${}_4$
• Recent advances in understanding and manipulating magnetic and electronic properties of Eu$M_2{X}_2$ ($M$ = Zn, Cd; $X$ = P, As)
• Topological Descendants of Multicritical EuTl2
• Interplay of magnetism and band topology in Eu${}_{1-x}$Ca${}_x$Mg${}_2$Bi${}_2$ (x=0, 0.5) from first principles study
• Topological electronic structure of YbMg${}_2$Bi${}_2$ and CaMg${}_2$Bi${}_2$