Spin-polarized transport in ferromagnetic multilayers: An unconditionally convergent FEM integrator.

Spin-polarized transport in ferromagnetic multilayers: An unconditionally convergent FEM integrator.
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DOI:
10.1016/j.camwa.2014.07.010
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发表时间:
2014-09
期刊:
Computers & mathematics with applications (Oxford, England : 1987)
影响因子:
--
通讯作者:
Suess D
Suess D
中科院分区:
其他
文献类型:
--
作者:
Abert C;Hrkac G;Page M;Praetorius D;Ruggeri M;Suess D

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我们提出并分析了Landau-Lifshitz-Gilbert方程与自旋积累拟线性扩散方程耦合的解耦时间推进格式。该模型描述了磁性和非磁性多层结构中磁化和电子自旋积累的相互作用。尽管整个PDE系统具有很强的非线性,但所提出的积分器每个时间步只需要求解两个线性系统。证明了积分器对弱解的无条件收敛性。
We propose and analyze a decoupled time-marching scheme for the coupling of the Landau–Lifshitz–Gilbert equation with a quasilinear diffusion equation for the spin accumulation. This model describes the interplay of magnetization and electron spin accumulation in magnetic and nonmagnetic multilayer structures. Despite the strong nonlinearity of the overall PDE system, the proposed integrator requires only the solution of two linear systems per time-step. Unconditional convergence of the integrator towards weak solutions is proved.
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