We consider current-induced spin-transfer torque on an antiferromagnet (AFM) in a dual spin-valve setup. It is demonstrated that a net magnetization may be induced in the AFM by partially or completely aligning the sublattice magnetizations via a current-induced spin-transfer torque. This effect occurs for current densities ranging below 106 A/cm2. The direction of the induced magnetization in the AFM is shown to be efficiently controlled by means of the magnetic configuration of the spin-valve setup, with the antiparallell configuration yielding the largest spin-transfer torque. Interestingly, the magnetization switching time scale τswitch itself has a strong, nonmonotonic dependence on the spin-valve configuration. These results may point toward new ways to incorporate AFMs in spintronic devices to obtain novel types of functionality.
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机译：我们在双自旋阀设置中考虑了反铁磁体（AFM）上电流感应的自旋传递扭矩。已经证明，通过电流引起的自旋转移力矩，通过部分或完全对准亚晶格磁化强度，可以在AFM中引起净磁化强度。当电流密度低于106 A / cm2时，会发生这种影响。示出了通过自旋阀装置的磁性构造来有效地控制AFM中的感应磁化方向，其中反平行构造产生最大的自旋传递扭矩。有趣的是，磁化切换时间标度τswitch本身对自旋阀配置具有强烈的非单调依赖性。这些结果可能指向在自旋电子设备中合并AFM以获得新颖类型功能的新方法。
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