Spin Pumping of an Easy-Plane Antiferromagnet Enhanced by Dzyaloshinskii-Moriya Interaction

Abstract

Recently, antiferromagnets have received revived interest due to their significant potential for developing next-generation ultrafast magnetic storage. Here we report dc spin pumping by the acoustic resonant mode in a canted easy-plane antiferromagnet α-Fe2O3 enabled by the Dzyaloshinskii-Moriya interaction. Systematic angle and frequency dependent measurements demonstrate that the observed spin pumping signals arise from resonance-induced spin injection and inverse spin Hall effect in α-Fe2O3/metal heterostructures, mimicking the behavior of spin pumping in conventional ferromagnet/nonmagnet systems. The pure spin current nature is further corroborated by reversal of the polarity of spin pumping signals when the spin detector is switched from platinum to tungsten which has an opposite sign of the spin Hall angle. Our results highlight the potential opportunities offered by the low-frequency acoustic resonant mode in canted easy-plane antiferromagnets for developing next-generation, functional spintronic devices.

15 pages, 5 figures

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Cited by in corpus (21)

• Spin and spin current -- From fundamentals to recent progress
• Antiferromagnetic magnon spintronic based on non-reciprocal and non-degenerated ultra-fast spin-waves in the canted antiferromagnet α-Fe2O3
• Long-distance propagation of high-velocity antiferromagnetic spin waves
• Spin wave dispersion of ultra-low damping hematite ($\alpha {\text{-Fe}}_2{\text{O}}_3$) at GHz frequencies
• Antiferromagnetic resonance in $\alpha$-Fe${}_2$O${}_3$ up to its Néel temperature
• Unidirectional Spin Hall Magnetoresistance in Antiferromagnetic Heterostructures
• Cavity-mediated coupling of antiferromagnetic spin waves
• Planar Hall effect induced spin rectification effect and its strong impact on spin pumping measurements
• Absence of cross-sublattice spin pumping and spin-transfer torques in collinear antiferromagnets
• Spin Quenching and Transport by Hidden Dzyaloshinskii-Moriya Interactions
• Insight into the structural and magnetotransport properties of epitaxial heterostructures $\alpha$-Fe${}_2$O${}_3$-Pt(111): Role of the reversed layer sequence
• Spin orbit torque switching of antiferromagnet through the Neel reorientation in rare-earth ferrite
• Far-from-equilibrium universality in two-dimensional Heisenberg antiferromagnets
• Large spin-orbit torque in a-plane $\alpha$-Fe${}_2$O${}_3$/Pt bilayers
• Strongly nonlinear antiferromagnetic dynamics in high magnetic fields
• Anisotropic Field Suppression of Morin Transition Temperature in Epitaxially Grown Hematite Thin Films
• Coherent Spin Pumping Originated from Sub-Terahertz Néel Vector Dynamics in Easy Plane α-Fe2O3/Pt
• Influence of low-energy magnons on magnon Hanle experiments in easy-plane antiferromagnets
• Field-Assisted Sub-Terahertz Spin Pumping and Auto-Oscillation in NiO
• Magnetic precession induced spin accumulation in collinear antiferromagnets
• Quantum sensing magnonic number states using a bosonic mode as the probe