Pressure-induced enhancement of spin-charge conversion efficiency in CoFeB/Pt bilayer

We experimentally investigate the influence of the pressure on the spin-charge conversion efficiency in a CoFeB/Pt bilayer system by using a specially designed pressure-cell setup. The dc voltage spectra under the dynamical spin injection is found to show the systematic increase with increasing pressure. These modifications can be understood by the enhancement of the spin-charge conversion efficiency due to the modulation of the spin-orbit interaction and/or the exchange interaction at the interface. The present demonstration indicates that the pressure provides a tunable functionality for the physical constants in spintronic devices.