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Mutual Influence Between Macrospin Reversal Order And Spin-Wave Dynamics In Isolated Artificial Spin-Ice Vertices, F. Montoncello, L. Giovannini, Wonbae Bang, J. B. Ketterson, M. B. Jungfleisch, A. Hoffmann, Barry W. Farmer, Lance E. De Long
Mutual Influence Between Macrospin Reversal Order And Spin-Wave Dynamics In Isolated Artificial Spin-Ice Vertices, F. Montoncello, L. Giovannini, Wonbae Bang, J. B. Ketterson, M. B. Jungfleisch, A. Hoffmann, Barry W. Farmer, Lance E. De Long
Physics and Astronomy Faculty Publications
We theoretically and experimentally investigate magnetization reversal and associated spin-wave dynamics of isolated threefold vertices that constitute a Kagome lattice. The three permalloy macrospins making up the vertex have an elliptical cross section and a uniform thickness. We study the dc magnetization curve and the frequency versus field curves (dispersions) of those spin-wave modes that produce the largest response. We also investigate each macrospin reversal from a dynamic perspective, by performing micromagnetic simulations of the reversal processes, and revealing their relationships to the soft-mode profile calculated at the equilibrium state immediately before reversal. The theoretical results are compared with the …