We formulate an energy-storage concept based on the free energy associated with metastable magnetic configurations. Despite the active magnetic region of the battery being electrically insulating, it can sustain effective hydrodynamics of spin textures, whose conservation law is governed by topology. To illustrate the key physics and potential functionality, we focus here on the simplest quasi-one-dimensional case of planar winding of the magnetic order parameter. The energy is stored in the metastable winding number, which can be injected electrically by an appropriately tailored spin torque. Because of the nonvolatility and the endurance of magnetic systems, the injected energy can be stored essentially indefinitely, with the topological charge cycles that do not degrade over time.

中文翻译：

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通过拓扑自旋纹理的能量存储

我们基于与亚稳磁结构相关的自由能来制定能量存储的概念。尽管电池的有源磁区是电绝缘的，但它仍可以维持自旋纹理的有效流体力学，其守恒律受拓扑控制。为了说明关键的物理原理和潜在的功能，我们在这里集中讨论磁阶参数平面绕组的最简单的准一维情况。能量存储在亚稳态绕组数中，可以通过适当调整的自旋转矩将其电注入。由于磁性系统的非易失性和耐久性，所注入的能量可以基本上无限期地存储，并且拓扑电荷循环不会随时间而降低。