Generation of microwave radiation in planar spin-transfer devices

Details Generation of microwave radiation in planar spin-transfer devices Generation of microwave radiation in planar spin-transfer devices

2007-06-04

arxiv.org/abs/0706.0529v1

Phys. Rev. B 76, 140402(R) (2007)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevB.76.140402

Current induced precession states in spin-transfer devices are studied in the case of large easy plane anisotropy (present in most experimental setups). It is shown that the effective one-dimensional planar description provides a simple qualitative understanding of the emergence and evolution of such states. Switching boundaries are found analytically for the collinear device and the spin-flip transistor. The latter can generate microwave oscillations at zero external magnetic field without either special functional form of spin-transfer torque, or ``field-like'' terms, if Gilbert constant corresponds to the overdamped planar regime.

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