Micromagnetic study of soft magnetic nanowires
Source abstract
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 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.
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Research context
OpenAlex topics: Magnetic properties of thin films · Magnetic Properties and Applications · Characterization and Applications of Magnetic Nanoparticles
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Electrical and Computer Engineering, Youngstown State University 1 , Youngstown, Ohio 44555, USA
Applied and Computational Mathematics Division, National Institute of Standards and Technology 2 , Gaithersburg, Maryland 20899-8910, USA
Department of Electrical and Computer Engineering, University of Akron 3 , Akron, Ohio 44325-3904, USA
Funding
National Science Foundation
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