Enhanced Inverse Spin-Hall Effect in Ultrathin Ferromagnetic/Normal Metal Bilayers
arXiv:1210.5230 · doi:10.1063/1.4792693
Abstract
We measure electrically detected ferromagnetic resonance in microdevices patterned from ultra-thin Co/Pt bilayers. Spin pumping and rectification voltages are observed and distinguished via their angular dependence. The spin-pumping voltage shows an unexpected increase as the cobalt thickness is reduced below 2 nm. This enhancement allows more efficient conversion of spin to charge current and motivates a theory modelling the dependence of impurity scattering on surface roughness.
References in corpus (6)
- Direct electronic measurement of the spin Hall effect
- Electrical detection of spin pumping due to the precessing magnetization of a single ferromagnet
- Scaling behavior of the spin pumping effect in ferromagnet/platinum bilayers
- Microwave photovoltage and photoresistance effects in ferromagnetic microstrips
- Spin Hall Angle Quantification from Spin Pumping and Microwave Photoresistance
- Broadband ferromagnetic resonance of Ni81Fe19 wires using a rectifying effect