Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-09-11
Phys. Rev. B 75, 014430 (2007)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
This resubmission corrects typos in Appendix A 26 pages, 7 figures
Scientific paper
10.1103/PhysRevB.75.014430
We study theoretically the detection and possible utilization of electric current-induced mechanical torques in ferromagnetic-normal metal heterostructures that are generated by spin-flip scattering or the absorption of transverse spin currents by a ferromagnet. To this end, we analyze the DC voltage signals over a spin valve that is driven by an AC current. In agreement with recent studies, this "rectification", measured as a function of AC frequency and applied magnetic field, contains important information on the magnetostatics and --dynamics. Subsequently, we show that the vibrations excited by spin-transfer to the lattice can be detected as a splitting of the DC voltage resonance. Finally, we propose a concept for a spin-transfer-driven electric nanomotor based on integrating metallic nanowires with carbon nanotubes, in which the current-induced torques generate a rotary motion.
Bauer Gerrit E. W.
Brataas Arne
Kovalev Alexey A.
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