Dynamic exchange coupling in magnetic bilayers

Details Dynamic exchange coupling in magnetic bilayers Dynamic exchange coupling in magnetic bilayers

2002-10-26

arxiv.org/abs/cond-mat/0210588v2

Phys. Rev. Lett. 90 (2003) 187601

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 color figures

Scientific paper

10.1103/PhysRevLett.90.187601

A long-ranged dynamic interaction between ferromagnetic films separated by normal-metal spacers is reported, which is communicated by nonequilibrium spin currents. It is measured by ferromagnetic resonance (FMR) and explained by an adiabatic spin-pump theory. In FMR the spin-pump mechanism of spatially separated magnetic moments leads to an appreciable increase in the FMR line width when the resonance fields are well apart, and results in a dramatic line-width narrowing when the FMR fields approach each other.

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