Coherent transfer of spin angular momentum by evanescent spin waves within antiferromagnetic NiO

Abstract

Insulating antiferromagnets are efficient and robust conductors of spin current. To realise the full potential of these materials within spintronics, the outstanding challenges are to demonstrate scalability down to nanometric lengthscales and the transmission of coherent spin currents. Here, we report the coherent transfer of spin angular momentum by excitation of evanescent spin waves of GHz frequency within antiferromagnetic NiO at room temperature. Using element-specific and phase-resolved x-ray ferromagnetic resonance, we probe the injection and transmission of ac spin current, and demonstrate that insertion of a few nanometre thick epitaxial NiO(001) layer between a ferromagnet and non-magnet can even enhance the flow of spin current. Our results pave the way towards coherent control of the phase and amplitude of spin currents at the nanoscale, and enable the realization of spin-logic devices and spin current amplifiers that operate at GHz and THz frequencies.

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• Antiferromagnetic spintronics
• Electrically controlled long-distance spin transport through an antiferromagnetic insulator
• Propagating phonons coupled to an artificial atom
• Dynamic exchange coupling in magnetic bilayers
• Antiferromagnonic Spin Transport from Y${}_3$Fe${}_5$O${}_{12}$ into NiO
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• Spin colossal magnetoresistance in an antiferromagnetic insulator
• Experimental observation of a large ac-spin Hall effect
• Transformation of spin current by antiferromagnetic insulators
• Spin Seebeck imaging of spin-torque switching in antiferromagnetic Pt/NiO heterostructures
• Direct detection of pure spin-current by x-ray pump-probe measurements
• Frequency comb generation at THz frequencies by coherent phonon excitation in Si
• Weakly Coupled Motion of Individual Layers in Ferromagnetic Resonance
• Coherent ac spin current transmission across an antiferromagnetic CoO insulator
• Temperature Dependence of Angular Momentum Transport Across Interfaces
• Interlayer Couplings Mediated by Antiferromagnetic Magnons
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Cited by in corpus (13)

• Magnetic texture based magnonics
• Coherent spin-wave transport in an antiferromagnet
• Fully Spin-transparent magnetic interfaces enabled by insertion of a paramagnetic NiO layer
• Room temperature antiferromagnetic resonance and inverse spin-Hall voltage in canted antiferromagnets
• Switching magnon chirality in artificial antiferromagnet
• Long-distance propagation of high-velocity antiferromagnetic spin waves
• Electronic correlations at paramagnetic $(001)$ and $(110)$ NiO surfaces: Charge-transfer and Mott-Hubbard-type gaps at the surface and subsurface of $(110)$ NiO
• Role of NiO in the nonlocal spin transport through thin NiO films on Y${}_3$Fe${}_5$O${}_{12}$
• Magnon hybridization in ferrimagnetic heterostructures
• X-ray detected ferromagnetic resonance techniques for the study of magnetization dynamics
• Observation of Coherently Coupled Cation Spin Dynamics in an Insulating Ferrimagnetic Oxide
• Electron-magnon spin conversion and magnonic spin pumping in antiferromagnet/heavy metal heterostructure
• Ginzburg-Landau theory of spin pumping through an antiferromagnetic layer near the Néel temperature