Tunable zero field ferromagnetic resonance in arrays of bistable magnetic nanowires

Medina, Joaquin De La Torre;Piraux, Luc;Encinas, Armando
(2010) Applied Physics Letters — Vol. 96, n° 4 (2010)

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  • Medina, Joaquin De La TorreUCLouvain
    Author
  • Piraux, LucUCLouvain
    Author
  • Encinas, Armando
    Author
Abstract
The tunability of the zero field resonance frequency in arrays of bistable nanowires is demonstrated. Analysis of the resonance spectra for different remanent states show that the signal results from the superposition of the double absorption related to wires magnetized in both the positive and negative direction. An analytical model is proposed and validated which depends of the configuration dependent dipolar interaction and the peak amplitude of the superposing signals. The range over which the zero field resonance frequency can be tuned has a lower bound at remanence equal to one and a maxima when remanence vanishes.
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Medina, J. D. L. T., Piraux, L., & Encinas, A. (2010). Tunable zero field ferromagnetic resonance in arrays of bistable magnetic nanowires. Applied Physics Letters, 96(4). https://doi.org/10.1063/1.3295706 (Original work published 2010)