Micromagnetic study of domain wall depinning driven by nanosecond current pulse in notched Permalloy nanowires
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Micromagnetic study of domain wall depinning driven by nanosecond current pulse in notched Permalloy nanowires

机译:纳米孔脉冲纳米型纳米脉冲驱动的畴壁脱落的微磁性研究

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AbstractThe complete understanding of domain wall (DW) dynamics is important in the design of future spintronic devices. The characteristics of faster time-scale and lower current amplitude to move DW along nanowire are crucial in fabrication upgrade. In this study, we have investigated depinning behavior of magnetic domain wall triggered by nanosecond current pulse in notched Permalloy nanowires by means of micromagnetic simulation. We introduced double-triangular notch as the constrictions in the nanowire. The non-adiabaticity of the spin-transfer-torque is considered in simulation by varying the non-adiabatic constant (β) value. We observed that the depinning current density (Jd) was not significantly affected byβfor notch size (s)?td) forβ?≥?0.04 was slightly constant for all the cases withs?>?70?nm, where the DW structure was kept to be a transverse structure during the depinning process. The broadly applicable depinning behavior is considered to contribute to the development of high-speed memory storage devices based on magnetic domain wall.]]>
机译:<![CDATA [ 抽象 域墙(dw)动态的完全理解在未来的旋转式设备的设计中很重要。沿纳米线移动DW的更快时间尺度和较低电流幅度的特性在制造升级中至关重要。在该研究中,通过微微磁性模拟,我们研究了在缺口渗透合金纳米线中由纳秒电流脉冲触发的磁畴壁的分解行为。我们引入了双三角形陷波作为纳米线的收缩。通过改变非绝热常数(β)值来考虑自旋转移扭矩的非绝压。我们观察到脱桂电流密度( j d )没有受到显着影响β< / ce:斜体>用于缺口尺寸( s )?<?50?nm。有趣的是,我们发现脱落时间( t d )对于βΔ≥0.04对于所有情况下,对于 s Δω70≤nm,其中DW结构在脱钢过程中保持横向结构。广泛适用的脱落行为被认为是有助于发展基于磁畴壁的高速存储器存储设备的开发。 ]]>

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