MAGNETIZATION REVERSAL IN NANOSTRUCTURED CO PD MULTILAYERS/

We report the experimental results on magnetization reversal in Co/Pd multilayers. Interestingly enough, reversal phenomena in this system w ere found to be strongly dependent on the magnetic properties varied w ith the Co-sublayer thickness. Direct domain observations and magnetiz ation viscosity measurements revealed that wall motion was dominant In the samples having 2-Angstrom-thick Co sublayer, whereas nucleation w as dominant in those having 4-Angstrom-thick Co sublayer. Magnetizatio n reversal was theoretically studied using a nanomagnetic model and th e strong dependence of reversal behavior on the magnetic properties co uld be qualitatively explained.