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Updated: Jan 30, 2026

Formulation and Characterization of Bioactive Agent Containing Nanodisks
Published on: March 17, 2023
Coercive field enhancement in Co nanodisks: single-domain to vortex switching
Ciro F Gélvez1, Edgar J Patiño1,2,3
1Departamento de Física, Universidad de los Andes, Carrera 1 No. 18A-12, A.A. 4976-12340, Bogotá, Colombia.
None:
Magnetic multi-layered nanodisks (ND) show great promise as these are relatively easy to assemble and control, facilitating biological and storage applications. In the present work, Ti/Co/Nb ND were fabricated with a varying Co layer thickness between 6 and 14 nm. Using vibrating sample magnetometry and micromagnetic simulations (OOMMF), their magnetic properties were investigated. Our results reveal a peak in coercive field at a critical thickness that separates the two magnetic phases; single domain and vortex phase. This peak is characterized by a substantially larger coercive field and allows to establish an explicit phase diagram as a function of diameter and thickness of the ND. This opens the possibility to investigate such enhancement in other ferromagnetic materials too.
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