论文标题
零场磁接地eumg $ _2 $ bi $ _2 $
Zero-field magnetic ground state of EuMg$_2$Bi$_2$
论文作者
论文摘要
据报道，分层的三角eumg $ _2 $ _2 $ $ _2 $是一种拓扑半学，可容纳多个dirac点，可以通过磁性顺序开始或分裂。在这里，我们报告了零场单晶中子中子折叠和大量的磁化率测量值与温度$χ（t）$ eumg $ _2 $ _2 $ _2 $ _2 $ _2 $，表明乘法内订购是铁磁内的是铁磁性的（eu $ $^{2+}，\ s = 7/2 $），\ s = 7/2 $ - abiment and andement Alighate abient anders andents andents andents andents Aligned a andents AlignEd nements AlignEd apered an抗铁磁性（即A型抗铁磁性）在Néel温度以下。
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 $χ(T)$ 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.
