Intrinsic oscillation of coupled domain walls in a perpendicularly magnetized nanowire system
Intrinsic oscillation of coupled domain walls in a perpendicularly magnetized nanowire system
复制标题
垂直磁化纳米线系统中耦合畴壁的本征振荡
DOI：
10.1063/1.4953764
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发表时间：
2016-06
影响因子：
3.2
通讯作者：
Shi Jing
中科院分区：
文献类型：
--
作者：
Luo Xin;Lu Zhihong;Yuan Cheng;Guo Fang;Xiong Rui;Shi Jing
采用微磁学模拟方法研究了具有垂直磁晶各向异性（PMA）的双纳米线系统中两个畴壁（DW）的动力学行为。结果表明，在没有外加电流的情况下，DW的运动模式是平移加振荡。与面内振荡不同的是，在双PMA-纳米线系统中，双金属丝相遇前的振荡是非常本质的，其振荡频率和振幅仅取决于纳米线之间的间距和纳米线的材料，而与外加电流和双金属丝之间的距离无关.当施加适当的电流时，耦合的DW将仅振荡而不执行平移运动。振荡频率可达几GHz。除了通过改变纳米线间隔在大范围内调谐之外，还可以通过调节纳米线的磁各向异性（K）或磁化强度（Ms）来稍微修改振荡频率。这一发现可能对D...
The dynamics of two domain walls (DWs) in a system of two nanowires with perpendicular magnetocrystalline anisotropy (PMA) was investigated by micromagnetic simulation. It was found that without applied current, the motion mode of DWs is translational motion plus oscillation. Different from its in-plane counterpart, in a two-PMA-nanowire system, the oscillation of DWs before encountering is quite intrinsic—the frequency and the amplitude only depend on the separation between nanowires and the material of the nanowires, and have no relationship with applied current and the distance between two DWs. When applying proper currents, the coupled DWs will only oscillate without performing translational motion. The oscillation frequency can reach several GHz. Besides being tuned in a large range by varying the nanowire separation, the oscillation frequency can also be slightly modified by adjusting the magnetic anisotropy (K) or magnetization (Ms) of the nanowire. This finding may be of great importance for the d...
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