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Effect of Spin Torque on Magnetization Switching Speed Having Nonuniform Spin Distribution

机译:自旋转矩对自旋分布不均匀的磁化开关速度的影响

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摘要

We study the influence of the spin torque, which depends on the space and time derivative of magnetization, on magnetization reversal time in a ferromagnetic fine particle. The spin torque operates to dissipate the angular momentum of the magnetization precession, and the torque increases in a spin vortex structure. We calculate the magnetization reversal time under a DC magnetic field using the Landau-Lifshitz-Gilbert equation containing a spin torque term. We found that the spin torque changes the magnetization switching speed significantly during the reversal process by maintaining a spin vortex in an intermediate state.
机译:我们研究了自旋转矩对铁磁细颗粒中磁化反转时间的影响,该转矩取决于磁化的空间和时间导数。自旋扭矩用于消散磁化旋进的角动量,并且扭矩在自旋涡旋结构中增加。我们使用包含自旋转矩项的Landau-Lifshitz-Gilbert方程计算直流磁场下的磁化反转时间。我们发现,自旋转矩通过将自旋涡旋保持在中间状态而在反转过程中显着改变了磁化转换速度。

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