Kuch, W., Vogel, J., Camarero, J., Fukumoto, K., Pennec, Y., Bonfim, M., Pizzini, S., Kirschner, J.

The magnetization reversal dynamics of an Fe₂₀Ni₈₀/Cu/Co spin valve is investigated on the nanosecond time scale by magnetic microscopy with time and layer resolution. It is found that the speed by which micron-sized magnetic domains in the magnetically soft Fe₂₀Ni₈₀ layer are expanded by external field pulses exhibits a dependence on the change in domain-wall length, and on the coupling to the local magnetization direction of the Co layer.

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