Local hysteresis variation of CoÕPd nanomultilayers
نویسندگان
چکیده
Local coercivity variation of Co/Pd nanomultilayers has been investigated by measuring the polar Kerr hysteresis loops of the local areas of submicron size using a magneto-optic Kerr microscope system. Interestingly, the local coercivity distribution was very sensitive to an increase in the number of repeats: the ~2 Å Co/11 Å Pd)10 sample showed a smooth variation of the local coercivity, while ~2 Å Co/11 Å Pd!18 showed a large fluctuation. Based on the thermally activated relaxation model, we have found that this local coercivity variation had a crucial effect on the contrasting magnetization reversal behavior observed in those samples, wall-motion dominant for the former sample and nucleation dominant for the latter one. © 2000 American Institute of Physics. @S0021-8979~00!89108-2#
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تاریخ انتشار 2000