Micromagnetic simulations of small arrays of submicron ferromagnetic particles
| Autor: | Christine C. Dantas, Luiz Alberto de Andrade |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Physics
Condensed Matter - Materials Science Condensed matter physics Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Condensed Matter Physics Ferromagnetic resonance Resonance (particle physics) Electronic Optical and Magnetic Materials Magnetic field Dipole Magnetization Amplitude Spin wave Precession |
| DOI: | 10.48550/arxiv.0807.1978 |
| Popis: | We report the results of a set of simulations of small arrays of submicron ferromagnetic particles. The actions of dipolar and exchange interactions were qualitatively investigated by analysing the ferromagnetic resonance spectra at 9.37 GHz resulting from the magnetization response of con- nected and unconnected particles in the array as a function of the applied dc magnetic field. We find that the magnetization precession movement (at resonance) observed in individual particles in the array presents a distinctive behaviour (an amplitude mismatch) in comparison to isolated, one-particle reference simulations, a result that we attribute to the action of interparticle dipolar couplings. Exchange interactions appear to have an important role in modifying the spectra of connected particles, even through a small contact surface. Comment: 24 pages, 8 figures, accepted for publication in Physical Review B |
| Databáze: | OpenAIRE |
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