Abstract
Low-energy $\ensuremath{\beta}$-detected nuclear magnetic resonance was used to investigate the spatial dependence of the hyperfine magnetic fields induced by Fe in the nonmagnetic Ag of an Au(40 \AA{})/Ag(200 \AA{})/Fe(140 \AA{}) (001) magnetic multilayer grown on GaAs. The resonance line shape in the Ag layer shows dramatic broadening compared to that of intrinsic Ag. This broadening is attributed to large magnetic fields induced in this layer by the magnetic Fe layer. We find that the induced hyperfine field in the Ag follows a power law decay away from the Ag/Fe interface with power $\ensuremath{-}1.93(8)$, and a field extrapolated to 0.23(5) T at the interface.
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