Effects of the thickness asymmetry of nanostructured exchange-coupled trilayers on their dynamic magnetization switching

Kim, K. S.; Lee, K. J.; Lim, S. H.
October 2008
Applied Physics Letters;10/13/2008, Vol. 93 Issue 15, p152507
Academic Journal
The effects of thickness asymmetry (Δt) on the dynamic magnetization switching of exchange-coupled trilayers are investigated in this study. Elliptical thin films that have lateral dimensions of 200×100 nm2 are considered. A significant difference in the dynamic switching behavior is observed depending on Δt. Both the switching field and the switching time decrease as Δt increases. A Fourier analysis of the magnetization oscillation, which is followed by the initial coherent rotation, shows multiple oscillation frequencies. This tendency is more pronounced at a larger Δt. The main oscillation frequency tends to increase with an increase in Δt.


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