论文标题
弱铁磁ruf $ _4 $单层
Magneto-optical Kerr effect and magnetoelasticity in weak ferromagnetic RuF$_4$ monolayer
论文作者
论文摘要
对于他们有趣的物理和有希望的应用，已吸引了大量的研究兴趣。在这项工作中，基于相对论密度功能理论，我们揭示了单层ruf $ _4 $中有趣的磁性和相关性能，可以从其整体相中剥落。尽管在最近的邻骨之间几乎在抗铁磁体上对齐，但由于反对称的dzyaloshinskii-moriya相互作用以及单苯二离子型号的抗铁磁性而产生弱的铁磁性。可以观察到这种抗铁磁铁的突出磁光kerr效应，类似于常规的强铁磁体。另外，单轴应变可以诱导铁弹性切换，并与自旋方向的平面旋转一起旋转，从而产生强大的内在磁弹性。我们的工作不仅提出了二维磁性材料的替代方向，而且还为基于抗铁磁磁弹性或磁光材料的未来设备提供了提示。
Considerable research interest has been attracted to noncollinear magnetic structures for their intriguing physics and promising applications. In this work, based on relativistic density functional theory, we reveal the interesting magnetic order and relevant properties in monolayer RuF$_4$, which can be exfoliated from its bulk phase. Although the spins on Ru ions are almost antiferromagnetically aligned between nearest-neighbors, weak ferromagnetism is generated because of the antisymmetric Dzyaloshinskii-Moriya interaction as well as the single-ion anisotropy. A prominent magneto-optical Kerr effect can be observed for this antiferromagnet, similar to those of regular strong ferromagnets. In addition, a uniaxial strain can induce a ferroelastic switching together with the in-plane rotation of spin direction, giving rise to a strong intrinsic magnetoelasticity. Our work not only suggests an alternative direction for two-dimensional magnetic materials, but also provides hints to future devices based on antiferromagnetic magnetoelastic or magneto-optical materials.
