论文标题
$ s = 5/2 $交错三角晶格抗Fiferromagnet ba $ _2 $ mnteo $ _6 $
Magnetic ordering and spin dynamics in $S=5/2$ staggered triangular lattice antiferromagnet Ba$_2$MnTeO$_6$
论文作者
论文摘要
我们报告了使用磁敏感性，比热，中子粉末衍射和非弹性中子散射测量测量值以及第一原理密度的功能理论计算，对交错堆叠的三角形晶格BA $ _6 $ $ _6 $的磁性研究进行了研究。中子衍射测量结果揭示了一个反铁磁性顺序，其传播矢量$ \ textbf {\ emph {k}} =（0.5，0.5，0）$和n {é} el {n {é} el $ t_ \ text \ text {n} \近k。抗铁磁。通过用线性自旋波理论对INS频谱进行建模，确定最近的内层，最近的层中的磁交换相互作用，确定为$ j_1 = 0.27（3），J_2 = 0.27（3），$和$ J_3 = -0.05（1）$ MEV，以及Easy-Mev of Easy-aSis anis anis anis ansosos的小额均值$ d_ {zz} = -0.01 $ MEV。我们得出了一个磁相图，该图表明，稳定了collinear Stripe-type抗铁磁性顺序是$ j_1，j_2 $和$ j_3 $之间的竞争。
We report studies of the magnetic properties of a staggered stacked triangular lattice Ba$_2$MnTeO$_6$ using magnetic susceptibility, specific heat, neutron powder diffraction and inelastic neutron scattering measurements, as well as first principles density functional theory calculations. Neutron diffraction measurements reveal an antiferromagnetic order with a propagated vector $\textbf{\emph{k}}=(0.5, 0.5, 0)$ and N{é}el transition temperature of $T_\text{N}\approx20$ K. The dominant interaction derived from the Curie-Weiss fitting to the inverse DC susceptibility is antiferromagnetic. Through modelling the INS spectrum with the linear spin wave theory, the magnetic exchange interactions for the nearest intralayer, nearest interlayer, and next nearest interlayer are determined to be $J_1=0.27(3),J_2=0.27(3),$ and $J_3=-0.05(1)$ meV, respectively, and a small value of easy-axis anisotropy of $D_{zz}=-0.01$ meV is introduced. We derive a magnetic phase diagram that reveals that it is the competition between $J_1, J_2$, and $J_3$ that stabilizes the collinear stripe-type antiferromagnetic order.
