Collective magnetization dynamics in nano-arrays of thin FePd discs

Abstract

We report on the magnetization dynamics of a square array of mesoscopic discs, fabricated from an iron palladium alloy film. The dynamics properties were explored using ferromagnetic resonance measurements and micromagnetic simulations. The obtained spectra exhibit features resulting from the interactions between the discs, with a clear dependence on both temperature and the direction of the externally applied field. We demonstrate a qualitative agreement between the measured and calculated spectra. Furthermore, we calculated the mode profiles of the standing spin waves excited during a time-dependent magnetic field excitations. The resulting maps confirm that the features appearing in the ferromagnetic resonance absorption spectra originate from the temperature and directional dependent inter-disc interactions.

arXiv comment9 pages, 10 figures

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Cited by in corpus (5)

• Applications of Nanomagnets as Dynamical Systems
• Collective magnetic dynamics in artificial spin ice probed by AC susceptibility
• The effect of confinement on thermally induced fluctuations in nanomagnets
• Multiple energy-scales in vertex-frustrated mesospin systems
• Temperature induced collapse of spin dimensionality in magnetic metamaterials