We study theoretically the detection and possible utilization of electriccurrent-induced mechanical torques in ferromagnetic-normal metalheterostructures that are generated by spin-flip scattering or the absorptionof transverse spin currents by a ferromagnet. To this end, we analyze the DCvoltage signals over a spin valve that is driven by an AC current. In agreementwith recent studies, this "rectification", measured as a function of ACfrequency and applied magnetic field, contains important information on themagnetostatics and --dynamics. Subsequently, we show that the vibrationsexcited by spin-transfer to the lattice can be detected as a splitting of theDC voltage resonance. Finally, we propose a concept for a spin-transfer-drivenelectric nanomotor based on integrating metallic nanowires with carbonnanotubes, in which the current-induced torques generate a rotary motion.
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