Antiferromagnetic nano-oscillator in external magnetic fields

Abstract

We describe the dynamics of an antiferromagnetic nano-oscillator in an external magnetic field of any given time distribution. The oscillator is powered by a spin current originating from spin-orbit effects in a neighboring heavy metal layer, and is capable of emitting a THz signal in the presence of an additional easy-plane anisotropy. We derive an analytical formula describing the interaction between such a system and an external field, which can affect the output signal character. Interactions with magnetic pulses of different shapes, with a sinusoidal magnetic field and with a sequence of rapidly changing magnetic fields are discussed. We also perform numerical simulations based on the Landau-Lifshitz-Gilbert equation with spin-transfer torque effects to verify the obtained results and find a very good quantitative agreement between analytical and numerical predictions.

References in corpus (8)

• Antiferromagnetic spintronics
• Enhanced Gilbert Damping in Thin Ferromagnetic Films
• Nonlocal magnetization dynamics in ferromagnetic heterostructures
• Spin pumping and magnetization dynamics in metallic multilayers
• Antiferromagnetic spin Seebeck Effect
• Terahertz Antiferromagnetic Spin Hall Nano-Oscillator
• Antiferromagnetic Spin Wave Field-Effect Transistor
• Transformation of spin current by antiferromagnetic insulators

Cited by in corpus (3)

• Nonabelian magnonics in antiferromagnets
• Antiferromagnetic Single-layer Spin-Orbit Torque Oscillators
• Damping and Anti-Damping Phenomena in Metallic Antiferromagnets: An ab-initio Study