Antiferromagnetic resonance excited by oscillating electric currents

Abstract

In antiferromagnetic materials the order parameter exhibits resonant modes at frequencies that can be in the terahertz range, making them interesting components for spintronic devices. Here, it is shown that antiferromagnetic resonance can be excited using the inverse spin-Hall effect in a system consisting of an antiferromagnetic insulator coupled to a normal-metal waveguide. The time-dependent interplay between spin-torque, ac spin-accumulation and magnetic degrees of freedom is studied. It is found that the dynamics of the antiferromagnet effects the frequency-dependent conductivity of the normal metal. Further, it is shown that in antiferromagnetic insulators, the resonant excitation by ac spin-currents can be orders of magnitude more efficient than excitation by the current-induced Oersted field.

arXiv commentVersion 2: A sign error which I found in the previous version has been corrected. According changes have been made to the text, equations and figures. Apart from that, excitation by spin-torque and Oersted field are now compared under the condition of constant power injection. A new figure and references have been added

References in corpus (25)

• Current-driven Magnetization Reversal and Spin Wave Excitations in Co/Cu/Co Pillars
• Spin Torque Ferromagnetic Resonance Induced by the Spin Hall Effect
• Direct electronic measurement of the spin Hall effect
• Spin Hall Magnetoresistance Induced by a Non-Equilibrium Proximity Effect
• Theory of spin Hall magnetoresistance
• Measurement of the Spin-Transfer-Torque Vector in Magnetic Tunnel Junctions
• Spin pumping and spin-transfer torques in antiferromagnets
• Antiferromagnonic Spin Transport from Y${}_3$Fe${}_5$O${}_{12}$ into NiO
• Experimental test of the spin mixing interface conductivity concept
• Spin transfer and current-induced switching in antiferromagnets
• Spin Oscillations in Antiferromagnetic NiO Triggered by Circularly Polarized Light
• Conduction of spin currents through insulating oxides
• Inverse Spin Hall Effect in NiFe / Normal Metal Bilayers
• Tunable sign change of spin Hall magnetoresistance in Pt/NiO/YIG structures
• Anti-damping spin transfer torque through epitaxial Nickel oxide
• Ultrafast Switching of Antiferromagnets via Spin-transfer Torque
• Current-induced spin torque resonance of magnetic insulators
• Current-induced spin torque resonance of a magnetic insulator
• Symmetry and the macroscopic dynamics of antiferromagnetic materials in the presence of spin-polarized current
• Current-induced spin wave excitation in Pt|YIG bilayer
• Spin Hall magnetoresistance in antiferromagnet/normal metal bilayers
• Manipulating antiferromagnets with magnetic fields: ratchet motion of multiple domain walls induced by asymmetric field pulses
• Spin Hall Magnetoimpedance
• Dynamic Feedback in Ferromagnet/Spin Hall Metal Heterostructures
• Electric-Field-Induced Spin Resonance in Antiferromagnetic Insulators: Inverse Process of the Dynamical Chiral Magnetic Effect

Cited by in corpus (5)

• Magnon-Mediated Indirect Exciton Condensation through Antiferromagnetic Insulators
• Spin-transfer Antiferromagnetic Resonance
• Theory of spin-Hall magnetoresistance in the AC (terahertz) regime
• Magnon-mediated electric current drag and nonlocal spin-Peltier effect in the ac regime
• Chirality and polarization of inertial antiferromagnetic resonances driven by spin-orbit torques