Micromagnetic understanding of current-driven domain wall motion in patterned nanowires
Micromagnetic understanding of current-driven domain wall motion in patterned nanowires
复制标题
DOI：
10.1209/epl/i2004-10452-6
复制
发表时间：
2005-03-01
期刊：
影响因子：
--
通讯作者：
Suzuki, Y
中科院分区：
文献类型：
--
作者：
Thiaville, A;Nakatani, Y;Suzuki, Y
为了解释最近的实验报告的磁畴壁（DW）在纳米线携带电流的运动，我们提出了一个modi。Landau-Lifchitz-吉尔伯特方程中自旋转移矩项的阳离子化。我们表明，它解释了，合理的参数，所测得的DW速度以及DW传播场在电流下的变化。我们还通过考虑粗糙的导线来引入双折射率。这导致了一个有限的DW传播场和DW传播的有限阈值电流，因此我们得出阈值电流是外在的。一些可能的模型，支持这个新的术语进行了讨论。
In order to explain recent experiments reporting a motion of magnetic domain walls (DW) in nanowires carrying a current, we propose a modi. cation of the spin transfer torque term in the Landau-Lifchitz-Gilbert equation. We show that it explains, with reasonable parameters, the measured DW velocities as well as the variation of DW propagation field under current. We also introduce coercivity by considering rough wires. This leads to a finite DW propagation field and finite threshold current for DW propagation, hence we conclude that threshold currents are extrinsic. Some possible models that support this new term are discussed.