In magnetic films driven by spin-polarized currents, the perpendicular-to-plane anisotropy is equivalent to breaking the time translation symmetry, i.e., to a parametric pumping. In this work, we numerically study those current-driven magnets via the Landau–Lifshitz–Gilbert–Slonczewski equation in one spatial dimension. We consider a space-dependent anisotropy field in the parametric-like regime. The anisotropy profile is antisymmetric to the middle point of the system. We find several dissipative states and dynamical behavior and focus on localized patterns that undergo oscillatory and phase instabilities. Using numerical simulations, we characterize the localized states’ bifurcations and present the corresponding diagram of phases.

在由自旋极化电流驱动的磁性膜中，垂直于平面的各向异性等效于打破时间平移对称性，即参数抽运。在这项工作中，我们通过Landau–Lifshitz–Gilbert–Slonczewski方程在一个空间维度上对这些电流驱动磁体进行了数值研究。我们考虑了参量状态下的空间依赖各向异性场。各向异性轮廓与系统的中点是反对称的。我们发现了一些耗散状态和动力学行为，并关注发生振荡和相位不稳定性的局部模式。使用数值模拟，我们表征了局部状态的分支，并给出了相应的相图。