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Title: Micromagnetic simulations of magnetic nanowires with constrictions by FIB
Authors: Long, H.H.
Ong, E.T.
Liu, T. 
Li, H.L.
Liu, Z.J.
Li, E.P.
Wu, H.Y. 
Adeyeye, A.O. 
Keywords: Fast Fourier transform on multipoles method (FFTM)
Hybrid FEM/BEM
Magnetic nanowire
Micromagnetic model
Issue Date: Aug-2006
Citation: Long, H.H., Ong, E.T., Liu, T., Li, H.L., Liu, Z.J., Li, E.P., Wu, H.Y., Adeyeye, A.O. (2006-08). Micromagnetic simulations of magnetic nanowires with constrictions by FIB. Journal of Magnetism and Magnetic Materials 303 (2 SPEC. ISS.) : e299-e303. ScholarBank@NUS Repository.
Abstract: Magnetic structures and magnetization processes of individual Ni nanowires with constrictions are investigated by means of micromagnetic modeling. The physical problem is modeled with the Landau-Lifshitz-Gilbert (LLG) equation, and the fast Fourier transform on multipoles (FFTM) method is employed to speed up the calculation of the demagnetization field. It is demonstrated that the FFTM algorithm is efficient and accurate for studying magnetization transition configuration in nanowire. The new approach is then used to study the switching phenomenon of the nanowire. And the simulation results show that the switching field increases a little with presence of constriction. The investigation of the magnetization processes illustrates the edge domain forms near constriction region for nanowire with diameter=30 nm and vortex domain for 200 nm case. © 2006 Elsevier B.V. All rights reserved.
Source Title: Journal of Magnetism and Magnetic Materials
ISSN: 03048853
DOI: 10.1016/j.jmmm.2006.01.120
Appears in Collections:Staff Publications

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