A Spin-Mechanical Device for Detection and Control of Spin Current by   Nanomechanical Torque
  We propose a spin-mechanical device to control and detect spin currents by mechanical torque. Our hybrid nano-electro-mechanical device, which contains a nanowire with a ferromagnetic-nonmagnetic interface, is designed to measure or induce spin polarized currents. Since spin carries angular momentum, a spin flip or spin transfer process involves a change in angular momentum--and hence, a torque--which enables mechanical measurement of spin flips. Conversely, an applied torque can result in spin polarization and spin current. 
P. Mohanty, G. Zolfagharkhani, S. Kettemann, P. Fulde