Antiferromagnetic single-layer spin-orbit torque oscillators

Roberto E. Troncoso, Karsten Rode, Plamen Stamenov, J. Michael D. Coey, Arne Brataas

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

We show how a charge current through a single antiferromagnetic layer can excite and control self-oscillations. Sustained oscillations with tunable amplitudes and frequencies are possible in a variety of geometries using certain classes of noncentrosymmetric materials that exhibit finite dissipative spin-orbit torque. We compute the steady-state phase diagram as a function of the current and spin-orbit torque magnitude. The anisotropic magnetoresistance causes the conversion of the resulting AF oscillations to a terahertz AC output voltage. These findings provide an attractive and novel route to design terahertz antiferromagnetic spin-orbit torque oscillators in simple single-layer structures.

Original languageEnglish
Article number054433
JournalPhysical Review B
Volume99
Issue number5
DOIs
StatePublished - 27 Feb 2019
Externally publishedYes

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