论文标题
范德华分层的抗fiferromagnet mnpse3中的磁交换相互作用
Magnetic exchange interactions in the van der Waals layered antiferromagnet MnPSe3
论文作者
论文摘要
蜂窝状晶格上带有磁离子的二维范德华化合物是各种外来行为的宿主。使用一种弹性和非弹性中子散射研究了一种这样的化合物中的磁相互作用，MNPSE $ _3 $。在磁有序的机制中观察到磁激励，并持续到高于排序温度的温度，$ \ rm t_n $ = 74 K，与低维磁相互作用一致。无弹性中子散射结果允许呈现模型旋转哈密顿量，其中包括$ j_ {1ab} $ = 0.45 meV，$ j_ {2ab} $ = 0.03 meV，$ j_ {3ab} $ j_ {3ab} $ = 0.19 mev，以及可靠的$ j_ $ j_ $ j_c = 0.031（5）（5）（5）在收集的数据中没有观察到以自旋差距形式的各向异性的证据。 MNPSE $ _3 $上的测量值与MNPS $ _3 $上的尺寸形成鲜明对比，尽管存在准2D磁性行为，但MNPSE $ _3 $中的Interlayer Exchange交互作用大幅增加。
Two-dimensional van der Waals compounds with magnetic ions on a honeycomb lattice are hosts to a variety of exotic behavior. The magnetic interactions in one such compound, MnPSe$_3$, are investigated with elastic and inelastic neutron scattering. Magnetic excitations are observed in the magnetically ordered regime and persist to temperatures well above the ordering temperature, $\rm T_N$ = 74 K, consistent with low dimensional magnetic interactions. The inelastic neutron scattering results allow a model spin Hamiltonian to be presented that includes dominant intralayer interactions of $J_{1ab}$=0.45 meV, $J_{2ab}$=0.03 meV, $J_{3ab}$=0.19 meV, and appreciable interlayer interactions of $J_c$=0.031(5) meV. No evidence for anisotropy in the form of a spin-gap is observed in the data collected. The measurements on MnPSe$_3$ are contrasted with those on MnPS$_3$ and reveal a large increase in the interlayer exchange interactions in MnPSe$_3$, despite the quasi-2D magnetic behavior.
