论文标题
手性孤子晶格对自旋极化电流的响应
Response of the chiral soliton lattice to spin polarized currents
论文作者
论文摘要
自旋极性电流启用了自旋转移扭矩，该扭矩能够操纵磁纹理。在这里，我们从理论上研究了自旋偏振电流对对应于横向磁场下单轴helimagnet中手性孤子晶格的磁纹理的影响。在足够小的电流密度下，手性孤子晶格达到稳定的运动状态，速度与施加电流的强度成正比，迁移率与孤子的密度和磁场无关。这种运动伴随着手性孤子晶格的一小圆锥变形。在较大的电流密度下，自旋转移扭矩破坏了手性孤子晶格，将系统驱动到平行于磁场的铁磁状态。我们分析了手性孤子晶格的变形如何取决于施加的电流密度。电流下的手性孤子晶格的破坏可能是用于旋转器应用的可能的擦除机制。
Spin polarized currents originate a spin-transfer torque that enables the manipulation of magnetic textures. Here we theoretically study the effect of a spin-polarized current on the magnetic texture corresponding to a chiral soliton lattice in a monoaxial helimagnet under a transverse magnetic field. At sufficiently small current density the chiral soliton lattice reaches a steady motion state with a velocity proportional to the intensity of the applied current, the mobility being independent of the density of solitons and the magnetic field. This motion is accompanied with a small conical distortion of the chiral soliton lattice. At large current density the spin-transfer torque destabilizes the chiral soliton lattice, driving the system to a ferromagnetic state parallel to the magnetic field. We analyze how the deformation of the chiral soliton lattice depends on the applied current density. The destruction of the chiral soliton lattice under current could serve as a possible erasure mechanisms for spintronic applications.
