Micromagnetic calculation of spin wave propagation for magnetologic devices
Micromagnetic calculation of spin wave propagation for magnetologic devices
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DOI：
10.1063/1.2836791
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发表时间：
2008-04-01
影响因子：
3.2
通讯作者：
Dean, Julian
中科院分区：
文献类型：
--
作者：
Bance, Simon;Schrefl, Thomas;Dean, Julian
磁波包在磁性纳米线中的传播被计算为线宽、场强、场斜坡时间、场面积大小和磁性纳米线几何形状的函数。通过在20 nm宽的区域中的磁化中施加小的扰动来局部地激发自旋波。波包从输入区域发射，并以740 m/s的速度沿着导线行进。有限元微磁模拟表明，波包可以引导沿着弯曲的纳米结构，没有由于几何形状的损失，振幅和频率是完全相同的，在一个直导线与激励点和探针之间的距离相等。波的振幅被发现随着激发场的上升时间的增加而减小，上限为100 ps。对于厚度为10 nm的坡莫合金线，频率峰值从宽度为60 nm的线中的10 GHz变化到宽度为140 nm的线中的6 GHz。(c)2008年美国物理研究所。
The propagation of magnetic wave packets in magnetic nanowires was calculated as a function of wire width, field strength, field ramp time, field area size, and geometry of a magnetic nanowire. Spin waves are excited locally by applying a small perturbation in the magnetization in a 20 nm wide region. A wave packet is emitted from the input region and travels along the wire with a velocity of 740 m/s. The finite element micromagnetic simulations show that wave packets can be guided along a bent nanostructure without losses due to geometry; amplitude and frequency are exactly the same as in a straight wire with equal distance between excitation point and probe. The wave amplitude was found to decrease with increasing rise time of the excitation field with an upper limit of 100 ps. For a Permalloy wire with a thickness of 10 nm, the frequency peak changes from 10 GHz in a wire with 60 nm width to 6 GHz in a wire with 140 nm width. (c) 2008 American Institute of Physics.