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Article Dans Une Revue Journal of Physics: Condensed Matter Année : 2013

Vortex polarization dynamics in a square magnetic nanodot

Résumé

Langevin simulations at finite temperature of two-dimensional magnetic nanodots were performed using the Landau-Lifshitz equation with exchange and dipolar interactions. In a wide range of temperatures, the dynamics of square samples with one central vortex was studied, focusing on the out-of-plane magnetic component at the vortex-core. This vortex-core undergoes polarization sign reversals in a thermally activated process. In the intervals between polarization flips, the out-of-plane spin components at the vortex-core show oscillations with identifiable frequencies connected with certain eigenfrequencies of the system associated with polarity active modes. The vortex-core positions were also monitored.
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Dates et versions

hal-01243111 , version 1 (14-12-2015)

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Philippe Depondt, J-C S. Levy, S. Mamica. Vortex polarization dynamics in a square magnetic nanodot. Journal of Physics: Condensed Matter, 2013, 25 (46), pp.466001. ⟨10.1088/0953-8984/25/46/466001⟩. ⟨hal-01243111⟩
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