research
oaioai:juser.fz-juelich.de:150586

Quenched Slonczewski windmill in spin-torque vortex oscillators

Abstract

We present a combined analytical and numerical study on double-vortex spin-torque nano-oscillators and describe a mechanism that suppresses the windmill modes. The magnetization dynamics is dominated by the gyrotropic precession of the vortex in one of the ferromagnetic layers. In the other layer, the vortex gyration is strongly damped. The dominating layer for the magnetization dynamics is determined by the sign of the product between sample current and the chiralities. Measurements on Fe/Ag/Fe nanopillars support these findings. The results open up a new perspective for building high quality-factor spin-torque oscillators operating at selectable, well-separated frequency bands

Similar works

Full text

thumbnail-image

Juelich Shared Electronic Resources

Provided a free PDF
oaioai:juser.fz-juelich.de:150586Last time updated on 5/16/2016View original full text link

This paper was published in Juelich Shared Electronic Resources.

Having an issue?

Is data on this page outdated, violates copyrights or anything else? Report the problem now and we will take corresponding actions after reviewing your request.