Model for a collimated spin wave beam generated by a single layer, spin torque nanocontact

Details Model for a collimated spin wave beam generated by a single layer, spin torque nanocontact Model for a collimated spin wave beam generated by a single layer, spin torque nanocontact

2007-10-15

arxiv.org/abs/0710.2890v3

Physical Review B, 77, 144401 (2008)

Physics

Condensed Matter

Materials Science

19 pages, 8 figures; added content, figure, and more references

Scientific paper

10.1103/PhysRevB.77.144401

A model of spin torque induced magnetization dynamics based upon semi-classical spin diffusion theory for a single layer nanocontact is presented. The model incorporates effects due to the current induced Oersted field and predicts the generation of a variety of spatially dependent, coherent, precessional magnetic wave structures. Directionally controllable collimated spin wave beams, vortex spiral waves, and localized standing waves are found to be excited by the interplay of the Oersted field and the orientation of an applied field. These fields act as a spin wave ``corral'' around the nanocontact that controls the propagation of spin waves in certain directions.

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