Interaction between ferromagnetic resonance and spin currents in nanostructures

We report here on the detection of ferromagnetic resonance in a permalloy nanostructure using the inverse spin-Hall effect in a platinum layer in contact. The tiny spin currents driven out of the precessing magnetization of a micron square sized structure generate an electrical voltage in the platinum layer because of spin-orbit scattering. We have achieved isolating this signal from other resistive contributions and show that it dominates in certain field geometries. This detection technique can therefore be applied in ferromagnetic nanostructured materials under certain experimental precautions. We also have been able to modify the damping of our Py nanostructures by injecting spin polarized currents using the spin-Hall effect in Pt.