论文标题
在共线抗铁磁阶段的旋转波$ _ \ bf {5} $ si $ _ \ bf {3} $
Spin-waves in the collinear antiferromagnetic phase of Mn$_\bf{5}$Si$_\bf{3}$
论文作者
论文摘要
通过结合两种独立的方法，即非弹性中子散射测量和密度功能理论计算，我们研究了Mn $ _5 $ _5 $ SI $ _3 $的高温共线抗磁相（AFM2）中的自旋波。我们获得其磁性地面特性和电子结构。这项研究使我们能够确定Mn $ _5 $ SI $ _3 $的AFM2阶段中的主要磁交换相互作用和磁晶的各向异性。此外，在垂直于各向异性容易轴的外部磁场的影响下研究了自旋激发光谱的演变。低能镁模式显示出不同的磁场依赖性，这是它们不同的进攻性质的直接结果。最后，还考虑了与Dzyaloshinskii-Moriya相互作用有关的可能影响。
By combining two independent approaches, inelastic neutron scattering measurements and density functional theory calculations, we study the spin-waves in the high-temperature collinear antiferromagnetic phase (AFM2) of Mn$_5$Si$_3$. We obtain its magnetic ground-state properties and electronic structure. This study allowed us to determine the dominant magnetic exchange interactions and magnetocrystalline anisotropy in the AFM2 phase of Mn$_5$Si$_3$. Moreover, the evolution of the spin excitation spectrum is investigated under the influence of an external magnetic field perpendicular to the anisotropy easy-axis. The low energy magnon modes show a different magnetic field dependence which is a direct consequence of their different precessional nature. Finally, possible effects related to the Dzyaloshinskii-Moriya interaction are also considered.
