We have observed several localized modes in the spin-wave spectrum of a permalloy microstripe (length 90 μm, width 1 μm, thickness 0.033 μm) magnetized along its width. The mode frequencies increase from 4.5 to 8 GHz with increasing applied field (0–1.1 kOe). These modes are interpreted as multiple spin–wave eigenstates in effective potential wells created by a strongly inhomogeneous internal magnetic field in the stripe near its edges.
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Bayer et al. (2003) studied this question.
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