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Reversal mechanisms in perpendicular magnetic nanostructures

Published

Author(s)

Justin M. Shaw, Stephen E. Russek, Michael J. Donahue, Thomas Thomson, Bruce Terris, Michael Schneider, Miles Olsen

Abstract

We find that the reversal mechanism in magnetic nanostructures is highly dependent on the nature and condition of the edges. Temperature and size dependent reversal properties of fabricated perpendicularly magnetized nanostructures down to 25 nm in diameter with two distinct edge conditions were experimentally studied and modeled. We find that the reversal mechanism can be either a Stoner-Wohlfarth (S-W) center nucleation process or an edge nucleation process that does not strictly conform to the S-W model. Micromagnetic simulations reproduce the observed change in reversal mechanism.
Citation
Physical Review B (Condensed Matter and Materials Physics)
Volume
78

Keywords

bit patterned media, Magnetic nanostructures, magnetic reversal, nanodots
Created July 16, 2008, Updated February 19, 2017