Magnetic force microscopy analysis of magnetization reversal in exchange-biased Co/CoO nanostructure arrays

Suck, S. Y.; Neu, V.; Wolff, U.; Bahr, S.; Bourgeois, O.; Givord, D.
October 2009
Applied Physics Letters;10/19/2009, Vol. 95 Issue 16, p162503
Academic Journal
Asymmetry in the magnetization reversal processes of exchange bias Co/CoO rectangular nanodot arrays is revealed by magnetic force microscopy. One-step switching is found along the descending branch of the hysteresis cycle whereas rotational or multidomain processes are involved along the ascending branch. From a statistical analysis of the environment of each dot during reversal, it is concluded that dipolar interactions do not significantly influence the magnetization reversal processes.


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