Tunneling of dipolar spin waves through a region of inhomogeneous magnetic field.

Fachbereich Physik and Focschungsschwerpunkt MINAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany.
Physical Review Letters (Impact Factor: 7.73). 08/2004; 93(4):047201. DOI: 10.1103/PhysRevLett.93.047201
Source: PubMed

ABSTRACT We show experimentally and by numerical simulations that spin waves propagating in a magnetic film can pass through a region of a magnetic field inhomogeneity or they can be reflected by the region depending on the sign of the inhomogeneity. If the reflecting region is narrow enough, spin-wave tunneling takes place. We investigate the tunneling mechanism and demonstrate that it has a magnetic dipole origin.

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