论文标题
圆盘形交换耦合磁异质结构中的圆条纹域和锥状状态涡旋
Circular stripe domains and cone state vortices in disk-shaped exchange coupled magnetic heterostructures
论文作者
论文摘要
垂直堆叠的交换耦合磁性几何形状的磁异质结构可以容纳复杂的非连续性磁化模式。通过调整层间交换耦合在包含磁性涡流状态的层和平面磁化层之间，人们可以有效地实现新的拓扑性手性纹理，例如锥状状态涡流和圆形条纹域。我们研究如何通过层间交换耦合和样品几何参数来控制圆条纹的数量。通过改变几何参数，发生了均匀状态，锥状状态涡流，圆条纹结构域和印迹涡流之间的连续相变，并通过全尺度的微磁模拟进行分析。分析描述提供了每个阶段中磁化纹理的直观图片。实现不同状态之间切换的可能性允许在Spintronic设备中使用可能应用的工程磁纹理。
Vertically stacked exchange coupled magnetic heterostructures of cylindrical geometry can host complex noncolinear magnetization patterns. By tuning the interlayer exchange coupling between a layer accommodating magnetic vortex state and an out-of-plane magnetized layer, one can efficiently realize new topological chiral textures such as cone state vortices and circular stripe domains. We study how the number of circular stripes can be controlled by both the interlayer exchange coupling and the sample geometrical parameters. By varying geometrical parameters, a continuous phase transition between the homogeneous state, cone state vortex, circular stripe domains, and the imprinted vortex takes place, which is analysed by full scale micromagnetic simulations. The analytical description provides an intuitive pictures of the magnetization textures in each of these phases. The possibility to realize switching between different states allows for engineering magnetic textures with possible applications in spintronic devices.
