Magnetomechanical Torques in Small Magnetic Cantilevers
arXiv:cond-mat/0511548 · doi:10.1143/JJAP.45.3878
Abstract
We study the dnamics of small magnetic cantilevers, either made from Si covered by a magnetic film or entirely ferromagnetic ones. The magnetomechanical torques are found to cause line splittings in ferromagnetic resonance spectra and magnetization reversal facilitated by mechanical degrees of freedom. We show that the magnetomechanical torques can extend the limits of detecting and exciting motion at the nanoscale. A "nanomotor" described here effectively transforms rf magnetic fields into mechanical oscillations. We furthermore propose to integrate mechanical oscillators into magnetoelectronic devices that make use of current-induced spin-transfer torques. This opens new possibilities for electric transducers of nanomechanical motion.
20 pages, 12 figures; submitted to a special issue of JJAP: Magnetization Dynamics in Spintronic Structures and Devices
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- Current-driven ferromagnetic resonance, mechanical torques and rotary motion in magnetic nanostructures
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- Recent Advances in Mechanical Torque Studies of Small-scale Magnetism
- Nanomechanical Spin-Polarizer
- Magnetoelastic Coupling and Possibility of Spintronic Electromagnetomechanical Effects