Effect of Spin Torque on Magnetization Switching Speed Having Nonuniform Spin Distribution
| Autor: | Akimasa Sakuma, Kazushige Hyodo, Chiharu Mitsumata |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Physics
Angular momentum Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics FOS: Physical sciences Electronic Optical and Magnetic Materials Magnetic field Vortex Magnetization Ferromagnetism Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Precession Torque Condensed Matter::Strongly Correlated Electrons Electrical and Electronic Engineering Spin-½ |
| Zdroj: | IEEE Transactions on Magnetics. 48:3951-3954 |
| ISSN: | 1941-0069 0018-9464 |
| DOI: | 10.1109/tmag.2012.2198913 |
| Popis: | 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. 4 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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