本文選題：斯格明子　切入點：微磁學計算　出處：《四川師范大學》2017年碩士論文　論文類型：學位論文

【摘要】：磁性斯格明子,由于它的穩(wěn)定性、小尺寸和所需相當?shù)偷尿?qū)動電流等優(yōu)點,有望成為代替磁疇壁的下一代的數(shù)據(jù)存儲的基本單元。然而,由于受到馬格努斯力的作用,斯格明子會在偏離電流的方向運動,因此可能在賽道的邊緣處湮滅,造成信息的丟失。本論文運用微磁學的方法理論,采用OOMMF軟件進行三維模擬,計算了斯格明子在通過調(diào)制磁晶各向異性來優(yōu)化的兩種賽道中的運動情況,主要結(jié)果如下:1.提出了一種基于斯格明子的新型賽道結(jié)構(gòu),即在Co Pt賽道的兩側(cè)邊緣對稱地加上高K材料,該賽道能很好地將斯格明子限制在賽道的中間區(qū)域,并且還能解決斯格明子在賽道末端的堵塞和在邊緣處的湮滅問題。此外,斯格明子在靠近賽道的邊界處會發(fā)生橫向和縱向的振蕩行為,但賽道兩側(cè)邊緣的DMI值對斯格明子的運動幾乎無影響。另外,通過調(diào)節(jié)賽道的材料和幾何參數(shù)優(yōu)化賽道設計,能實現(xiàn)較小的驅(qū)動電流獲得較大的斯格明子運動速度。2.提出了一種雙通道的賽道結(jié)構(gòu),更新和優(yōu)化了在賽道中二進制數(shù)據(jù)的表示方式。模擬結(jié)果顯示,通過改變D、w_m、K_(uv)的值,可以調(diào)節(jié)斯格明子在單通道或雙通道中運動。
[Abstract]:Because of its stability, small size and relatively low driving current, the magnetic spinner is expected to be the basic unit for the next generation of data storage in place of the magnetic domain wall. However, due to the effect of Magnus force, Schumminon will move away from the current, so it is possible to annihilate at the edge of the track, resulting in the loss of information. In this paper, we use the theory of micromagnetics and OOMMF software to carry out 3D simulation. The motion of Schumminon in two kinds of track optimized by magnetocrystalline anisotropy modulation is calculated. The main results are as follows: 1. A new circuit structure based on Schumminon is proposed. That is, adding high K materials symmetrically to both sides of the Co Pt circuit, the track can well limit the skimming in the middle of the track, and it can also solve the problem of skimming blocking at the end of the track and annihilation at the edge. Sgriminger oscillates horizontally and longitudinally near the edge of the track, but the DMI values on both sides of the track have little effect on the motion. In addition, the track design is optimized by adjusting the material and geometric parameters of the circuit. A two-channel circuit structure is proposed, which updates and optimizes the representation of binary data in the track. The simulation results show that by changing the value of DWM _ M _ T _ KT _ uv, the simulation results show that, by changing the value of DWM _ M _ T _ K _ T _ uv _ v, a two-channel circuit structure is proposed, and the expression of binary data in the circuit is updated and optimized. It can adjust the motion of Schumminon in single channel or double channel.
【學位授予單位】：四川師范大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP333;O441.2

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