Antiferromagnetic Single-layer Spin-Orbit Torque Oscillators

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 non-centrosymmetric 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.

arXiv comment5 pages, 3 figures and a supplemental material

References in corpus (16)

• Antiferromagnetic spintronics
• Antiferromagnetic spintronics
• Electrical switching of an antiferromagnet
• Relativistic Neel-order fields induced by electrical current in antiferromagnets
• Writing and Reading antiferromagnetic Mn${}_2$Au: Néel spin-orbit torques and large anisotropic magnetoresistance
• Self-oscillation
• Terahertz Antiferromagnetic Spin Hall Nano-Oscillator
• Spin Oscillations in Antiferromagnetic NiO Triggered by Circularly Polarized Light
• Anisotropic magnetoresistance in antiferromagnetic semiconductor Sr2IrO4 epitaxial heterostructure
• Spin-orbit torques in locally and globally non-centrosymmetric crystals: Antiferromagnets and ferromagnets
• THz-Frequency Spin-Hall Auto-Oscillator Based on a Canted Antiferromagnet
• Ultrafast Switching of Antiferromagnets via Spin-transfer Torque
• Microscopic theory of spin-orbit torques and skyrmion dynamics
• Phenomenology of Current-Induced Spin-Orbit Torques
• Designing a fully-compensated half-metallic ferrimagnet
• Antiferromagnetic nano-oscillator in external magnetic fields

Cited by in corpus (10)

• Spin-Torque-driven Terahertz Auto Oscillations in Non-Collinear Coplanar Antiferromagnets
• Precessional spin-torque dynamics in biaxial antiferromagnets
• Magnetization dynamics of the compensated ferrimagnet $M{n}_{2}R{u}_{x}Ga$
• Emission of fast-propagating spin waves by an antiferromagnetic domain wall driven by spin current
• Voltage-Controlled High-Bandwidth Terahertz Oscillators Based On Antiferromagnets
• Quasi-static magnetization dynamics in a compensated ferrimagnetic half-metal -- Mn${}_2$Ru${}_x$Ga
• Antiferromagnetic droplet soliton driven by spin current
• Analytical dispersion relation for forward volume spin waves in ferrimagnets near the angular momentum compensation condition
• Competition between terahertz magnetoelectric and Néel spin-orbit torque driven spin dynamics in metallic antiferromagnets
• Terahertz spin-orbit torque as a drive of spin dynamics in the insulating antiferromagnet Cr${}_2$O${}_3$