Temperature and vortex gyrotropic motion in 2-D magnetic nanodots by Langevin simulations
| Autor: | Ph. Depondt, J.-C.S. Lévy |
|---|---|
| Přispěvatelé: | Institut des Nanosciences de Paris (INSP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Matériaux et Phénomènes Quantiques (MPQ (UMR_7162)), Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2012 |
| Předmět: |
Physics
Out-of-equilibrium dynamic properties Condensed matter physics General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Vortex gyrotropic motion Vortex Magnetic dots Dipole Magnetic properties and materials Lattice (order) 0103 physical sciences Thermal Numerical simulation studies Magnetic properties of nanostructures Nanodot [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat] 010306 general physics 0210 nano-technology |
| Zdroj: | Physics Letters A Physics Letters A, Elsevier, 2012, 376 (45), pp.3411-3416. ⟨10.1016/j.physleta.2012.09.039⟩ Physics Letters A, 2012, 376 (45), pp.3411-3416. ⟨10.1016/j.physleta.2012.09.039⟩ |
| ISSN: | 0375-9601 1873-2429 |
| DOI: | 10.1016/j.physleta.2012.09.039 |
| Popis: | International audience; Vortex gyrotropic motion was simulated in two-dimensional square magnetic dots of three-dimensional spin vectors of nanometric size. The Landau-Lifshitz equation with exchange and dipolar interactions was integrated at different temperatures with initial conditions consisting in a single vortex shifted aside from the central position. The gyrotropic frequency is computed. The experimental observation that this frequency decreases as temperature is increased is confirmed: we suggest that the reason is the thermal dependence of the damping coefficient in Thiele's equation. Pinning of the vortex-core motion by the underlying lattice is also observed. (C) 2012 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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