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Numerical investigation of spin-torque using the Heisenberg model

机译:使用Heisenberg模型的自旋扭矩数值研究

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We present numerical calculations of the spin transfer torque resulting in current-induced domain wall motion. Rather than the conventional micromagnetic finite difference or finite element method, we use an atomistic/classical Heisenberg spin model approach, which is well suited to study geometrically confined domain walls. We compute the behaviour of domain walls in a one dimensional chain when currents are injected using adiabatic and non-adiabatic spin torque terms. Our results are compared to analytical calculations and are found to agree very well for small current densities. At larger current densities deviations are observed, which can be attributed to the approximations used in the analytical calculations.
机译:我们提出了自旋传递扭矩导致电流感应域壁运动的数值计算。我们使用原子/经典的海森堡自旋模型方法,而不是常规的微磁有限差分或有限元方法,该方法非常适合研究几何约束的畴壁。当使用绝热和非绝热自旋转矩项注入电流时,我们计算一维链中畴壁的行为。我们的结果与分析计算进行了比较,发现对于小电流密度非常吻合。在较大的电流密度下,观察到偏差,这可以归因于分析计算中使用的近似值。

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