Magnetization reversal behavior in complex shaped Co nanowires: A nanomagnet morphology optimization - Archive ouverte HAL
Article Dans Une Revue Journal of Applied Physics Année : 2014

Magnetization reversal behavior in complex shaped Co nanowires: A nanomagnet morphology optimization

Résumé

A systematic micromagnetic study of the morphological characteristic effects over the magnetic static properties of Co-based complex shaped nanowires is presented. The relevance of each characteristic size (i.e., length L, diameter d, and size of the nanowires head T) and their critical values are discussed in the coercive field optimization goal. Our results strongly confirms that once the aspect ratio (Ld) of the nanowire is bigger than around 10, the length is no more the pertinent parameter and instead the internal diameter and the shape of the nanowires play a key role. We attribute this behavior to the non uniform distribution of the demagnetizing field which is localized in the nanowires head and acts as a nucleation point for the incoherent magnetization reversal. Finally, angular dependence of the magnetization is simulated and compared to the case of a prolate spheroid for all considered morphologies.

Dates et versions

hal-04184069 , version 1 (21-08-2023)

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Citer

Fatih Zighem, Silvana Mercone. Magnetization reversal behavior in complex shaped Co nanowires: A nanomagnet morphology optimization. Journal of Applied Physics, 2014, 116 (19), ⟨10.1063/1.4901999⟩. ⟨hal-04184069⟩
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