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Showing papers by "Joseph Sklenar published in 2011"

Proceedings Article•DOI•
Low-field FMR studies of magnetic confinement effects in patterned ferromagnetic thin films

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V. S. Bhat1, Justin Woods1, Jeffrey Todd Hastings1, L. E. De Long1, Joseph Sklenar2, John B Ketterson2, Olle Heinonen3, K. Rivkin4, Vitali V. Metlushko5 •
University of Kentucky1, Northwestern University2, Argonne National Laboratory3, Seagate Technology4, University of Illinois at Chicago5
17 Oct 2011
TL;DR: In this paper, the authors performed broad-band (10 MHz-20 GHz) and tuned cavity (9.7 GHz) ferromagnetic resonance measurements on permalloy thin films patterned with square lattices of circular, square and diamond-shaped antidots of various sizes and separations.
Abstract: We have performed broad-band (10 MHz–20 GHz) and tuned cavity (9.7 GHz) ferromagnetic resonance measurements on permalloy thin films patterned with square lattices of circular, square and diamond-shaped antidots of various sizes and separations. We observe remarkably reproducible mode structures in the low-frequency, hysteretic regime in which various domain wall patterns and unsaturated magnetization textures exist and are strongly affected by the geometry of the antidot lattice. The field, frequency and angular dependences of the observed modes (some of which have not been previously observed) are generally in good agreement with our micromagnetic simulations.