publication . Article . Other literature type . 2002

langevin dynamic simulation of spin waves in a micromagnetic model

Chubykalo, O.; Hannay, J. D.; Wongsam, M.; Chantrell, R. W.; Gonzalez, J. M.;
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  • Published: 03 May 2002 Journal: Physical Review B, volume 65 (issn: 0163-1829, eissn: 1095-3795, Copyright policy)
  • Publisher: American Physical Society (APS)
Abstract
A Langevin dynamic (LD) model of thermally excited magnetization fluctuations is applied to the study of a linear chain of coupled spins representing a simple micromagnetic model system. It is shown that thermal activation gives rise to correlated magnetization fluctuations (spin waves) as a result of the collective response of the coupled system to the random thermal perturbations included in the LD approach. Two regimes are defined. In the ferromagnetic resonance regime the thermal perturbations result in small amplitude linear fluctuations that show classical spin-wave behavior, with characteristics of both exchange and magnetostatic modes. In the regime clos...
Subjects
free text keywords: Magnetization, Condensed matter physics, Dynamic simulation, Nuclear magnetic resonance, Spin wave, Spins, Nonlinear system, Amplitude, Physics, Dispersion relation, Ferromagnetic resonance
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publication . Article . Other literature type . 2002

langevin dynamic simulation of spin waves in a micromagnetic model

Chubykalo, O.; Hannay, J. D.; Wongsam, M.; Chantrell, R. W.; Gonzalez, J. M.;