Abstract
The dependence of domain wall velocity on applied field strength for an in-plane magnetized ultrathin epitaxial Ag/Fe/Ag(001) multilayer film has been measured using magneto-optics. Within the velocity range of 0–200 ms−1 we find a linear response, which is characteristic of viscous damping. We find a domain wall mobility value of 117±5 ms−1 Oe−1, which is comparable to that reported by other workers for high quality Fe whiskers. This shows that the Fe/Ag interfaces do not contribute substantially to the dynamic dissipation.
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