Energy Storage via Topological Spin Textures.
Energy Storage via Topological Spin Textures.
复制标题
DOI：
10.1103/physrevlett.121.127701
复制
发表时间：
2018-08
影响因子：
8.6
通讯作者：
Y. Tserkovnyak;Jiang Xiao
中科院分区：
文献类型：
--
作者：
Y. Tserkovnyak;Jiang Xiao
我们制定了一个能量存储的概念的基础上的自由能与亚稳态磁配置。尽管电池的活动磁性区域是电绝缘的，但它可以维持自旋纹理的有效流体动力学，其守恒定律由拓扑结构决定。为了说明关键的物理和潜在的功能，我们在这里集中在最简单的准一维的情况下，平面绕组的磁序参量。能量存储在亚稳态绕组数中，其可以通过适当定制的自旋扭矩电注入。由于磁系统的非易失性和耐久性，注入的能量基本上可以无限期地存储，拓扑电荷循环不会随着时间的推移而退化。
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.