Nanocomposite Soft Magnetic Materials Consideration of Domains and Domain Walls
Prof. Matthew A. Willard
Department of Materials Science and Engineering, Case Western Reserve University
Abstract: Magnetic alloys with nanocomposite microstructures possess some of the smallest coercivities ever measured. The combination of phase selection and microstructure refinement are responsible for the remarkable easy in switching. In such materials, the magnetic domain walls become exceedingly wide primarily due to a microstructure-induced reduction in magnetocrystalline anisotropy. In this seminar, the increase in magnetic domain wall width and its estimated size considering the random anisotropy model will be presented. Limitations of direct observation will also be discussed, as well as, the importance of magnetic domain walls in the overall soft magnetic behavior of this class of alloys. Specific results will be presented from recent work in Prof. Willard’s group.
Host: Jesse Berezovsky