Micromagnetic Simulation of CoFe Magnetic Nanorings: Switching Behavior in External Magnetic Field

Abstract:

The magnetization reversal processes of magnetic nanorings (Co₅₀Fe₅₀) with different geometric shapes are investigated. In addition to the expected onion and vortex magnetization states, other metastable states are observed in the magnetization processes. We anatomize the formation and transition of magnetic states, and the propagation and annihilation of domain walls in the reversal process through the dynamic picture. Phase diagrams for the magnetization switching behavior depending on the geometric parameters are presented. The simulation shows that the vortex state is stabilized in thick and narrow rings. The switching field from vortex to onion states turns out to increase with thickness and decrease with width and diameter.

• Periodical: Advanced Materials Research (Volume 710)
• Pages: 80-84
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.710.80
• Online since: June 2013
• Authors: Zhen Gang Guo, Li Qing Pan, Hong Mei Qiu, M. Yasir Rafique, Shuai Zeng
• Keywords: Domain Wall, Magnetic Nanorings, Vortex State

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