Physics – Condensed Matter – Materials Science
Scientific paper
2007-05-29
Phys. Rev. B 76, 184419 (2007)
Physics
Condensed Matter
Materials Science
Scientific paper
10.1103/PhysRevB.76.184419
The transmission of a dipole-dominated spin wave in a ferromagnetic film through a localised inhomogeneity in the form of a magnetic field produced by a dc current through a wire placed on the film surface was studied experimentally and theoretically. It was shown that the amplitude and phase of the transmitted wave can be simultaneously affected by the current induced field, a feature that will be relevant for logic based on spin wave transport. The direction of the current creates either a barrier or well for spin wave transmission. The main observation is that the current dependence of the amplitude of the spin wave transmitted through the well inhomogeneity is non-monotonic. The dependence has a minimum and an additional maximum. A theory was constructed to clarify the nature of the maximum. It shows that the transmission of spin waves through the inhomogeneity can be considered as a scattering process and that the additional maximum is a scattering resonance.
Hillebrands Burkard
Kostylev M. P.
Leven Britta
Schneider Tapio
Serga Alexander A.
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