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arXiv · 1211.0360

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

Kazushige Hyodo·Chiharu Mitsumata·Akimasa Sakuma
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Abstract

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.

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Kazushige Hyodo, Chiharu Mitsumata, Akimasa Sakuma. 2012-11-02. Effect of Spin Torque on Magnetization Switching Speed Having Nonuniform Spin Distribution. https://doi.org/10.1109/tmag.2012.2198913

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