Magnetomechanical Torques in Small Magnetic Cantilevers

Details Magnetomechanical Torques in Small Magnetic Cantilevers Magnetomechanical Torques in Small Magnetic Cantilevers

2005-11-22

arxiv.org/abs/cond-mat/0511548v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

20 pages, 12 figures; submitted to a special issue of JJAP: Magnetization Dynamics in Spintronic Structures and Devices

Scientific paper

10.1143/JJAP.45.3878

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.

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