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arXiv · 1510.01075

Ferromagnetic resonance of coupled shifted chains of nano-elements

Roland Bastardis·Jean-Louis Déjardin·François Vernay·Hamid Kachkachi
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Abstract

We investigate the FMR characteristics of a magnetic dimer composed of two chains of iron nanoparticles coupled by dipolar interactions. The latter are treated beyond the point-dipole approximation taking into account the finite size and arbitrary shape of the nano-elements. The resonance frequency is calculated as a function of the amplitude of the applied magnetic field and the resonance field is computed as a function of the direction of the applied field, varied both in the plane of the two chains and perpendicular to it. We highlight a critical value of the magnetic field which marks a state transition that should be important in magnetic recording media.

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Roland Bastardis, Jean-Louis Déjardin, François Vernay, Hamid Kachkachi. 2016-06-08. Ferromagnetic resonance of coupled shifted chains of nano-elements. https://doi.org/10.1063/1.4948570

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