Ahmadi, F.
, Donahue, M.
, Sozer, Y.
and Tsukerman, I.
(2019),
Micromagnetic Study of Soft Magnetic Nanowires, AIP Advances, [online], https://doi.org/10.1063/1.5130157, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=929134
(Accessed April 19, 2024)
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Micromagnetic Study of Soft Magnetic Nanowires
Published
Author(s)
Farzad Ahmadi, , Yilmaz Sozer, Igor Tsukerman
Abstract
In this paper, micromagnetic analysis of an array of long magnetic nanowires (NWs) embedded in a nonmagnetic matrix is performed. It is found that for NWs with diameters on the order of a hundred nanometers, the anisotropy and exchange energies are negligible, so the total free energy is a sum of the Zeeman and magnetostatic energies. The minimum magnetostatic energy corresponds to the maximum Zeeman energy, whereby half of the NWs are magnetized parallel to the external field, while the rest of the NWs are magnetized antiparallel to the external fields. The study shows a vortex behavior of the magnetic moments in the magnetization reversal process. Additionally, the average hysteresis loop area of the nanocomposite is inversely proportional to the NW diameter in the range from 20 to 200 nm. The results pave the way for designing of NW-based devices such as optimized magnetic sensors for biomedical applications with a trade-off between miniaturization and energy loss.Citation
AIP Advances
Pub Type
Journals
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Keywords
micromagnetic simulation, soft magnetic nanowires, array of nanowires, hysteresis of nanowires
Citation
Created December 26, 2019, Updated October 12, 2021