论文标题
可调的强磁各向异性在二维范德华抗铁磁铁中
Tunable Strong Magnetic Anisotropy in Two-Dimensional van der Waals Antiferromagnets
论文作者
论文摘要
我们表明，由磁性基材层堆叠在磁性基板层上，大大增强了2D抗铁磁铁的各向异性能量，这是由依赖sublattice依赖性的层间磁相互作用引起的，该相互作用定义了有效的各向异性能量。有趣的是，这种有效的能量与层间堆叠顺序和基板层的磁序有很强的伴侣，提供了独特的机械和磁性手段来控制抗磁磁性。这两种类型的控制方法明显影响议法磁化动力学，随着前者中的sublattice进动幅度的比例改变，后来的手性变化。在由层之间的相对扭曲或应变形成的Moiré超晶格中，与堆叠顺序的耦合在整个Moiré中引入了有效各向异性能量的景观，可用于创建具有定期局部局部降低较低含量的木元素。
We show that anisotropic energy of a 2D antiferromagnet is greatly enhanced via stacking on a magnetic substrate layer, arising from the sublattice-dependent interlayer magnetic interaction that defines an effective anisotropic energy. Interestingly, this effective energy couples strongly with the interlayer stacking order and the magnetic order of the substrate layer, providing unique mechanical and magnetic means to control the antiferromagnetic order. These two types of control methods affect distinctly the sublattice magnetization dynamics, with a change of the ratio of sublattice precession amplitudes in the former and its chirality in the later. In moiré superlattices formed by a relative twist or strain between the layers, the coupling with stacking order introduces a landscape of effective anisotropic energy across the moiré, which can be utilized to create nonuniform antiferromagnetic textures featuring periodically localized low-energy magnons.
