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

Exploring spin valve magnetization reversal dynamics with temporal, spatial and layer resolution: Influence of domain wall energy
Applied Physics Letters 85, (3),pp 440-442 (2004)
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.