We report the experimental results on magnetization reversal in Co/Pd multilayers. Interestingly enough, reversal phenomena in this system were found to be strongly dependent on the magnetic properties varied with the Co-sublayer thickness. Direct domain observations and magnetization viscosity measurements revealed that wall motion was dominant in the samples having 2-{}-thick Co sublayer, whereas nucleation was dominant in those having 4-{}-thick Co sublayer. Magnetization reversal was theoretically studied using a nanomagnetic model and the strong dependence of reversal behavior on the magnetic properties could be qualitatively explained.
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Choe et al. (1998) studied this question.
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