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Model for Collimated Spin Wave Beam Generated by a Single Layer, Spin Torque Nanocontact

Published

Author(s)

Mark Hoefer, Thomas J. Silva, Mark D. Stiles

Abstract

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.
Citation
Physical Review B (Condensed Matter and Materials Physics)
Volume
77
Issue
14
Created April 1, 2008, Updated February 19, 2017