Antiferromagnetic magnon spintronic based on non-reciprocal and non-degenerated ultra-fast spin-waves in the canted antiferromagnet α-Fe2O3

Abstract

Spin-waves in antiferromagnets hold the prospects for the development of faster, less power-hungry electronics, as well as promising physics based on spin-superfluids and coherent magnon-condensates. For both these perspectives, addressing electrically coherent antiferromagnetic spin-waves is of importance, a prerequisite that has so far been elusive, because unlike ferromagnets,antiferromagnets couple weakly to radiofrequency fields. Here, we demonstrate the detection of ultra-fast non-reciprocal spin-waves in the dipolar-exchange regime of a canted antiferromagnet using both inductive and spintronic transducers. Using time-of-flight spin-wave spectroscopy on hematite (α-Fe2O3), we find that the magnon wave packets can propagate as fast as 20 km/s for reciprocal bulk spin-wave modes and up to 6 km/s for surface-spin waves propagating parallel to the antiferromagnetic Neel vector. We finally achieve efficient electrical detection of non-reciprocal spin-wave transport using non-local inverse spin-Hall effects. The electrical detection of coherent non-reciprocal antiferromagnetic spin waves paves the way for the development of antiferromagnetic and altermagnet-based magnonic devices.

References in corpus (9)

• Roadmap on Spin-Wave Computing
• Subterahertz spin pumping from an insulating antiferromagnet
• Anisotropic long-range spin transport in canted antiferromagnetic orthoferrite YFeO${}_3$
• Long-distance propagation of high-velocity antiferromagnetic spin waves
• Evidence for spin current driven Bose-Einstein condensation of magnons
• Emerging research landscape of altermagnetism
• Antiferromagnetic resonance in $\alpha$-Fe${}_2$O${}_3$ up to its Néel temperature
• Spin-wave chirality and its manifestations in antiferromagnets
• Magnetic states at the surface of alpha-Fe2O3 thin films doped with Ti, Zn or Sn

Cited by in corpus (7)

• Laser patterning of magnonic structure via local crystallization of Yittrium Iron Garnet
• Giant spatial anisotropy of magnon lifetime in altermagnets
• Nonreciprocal phonons in PT-symmetric antiferromagnet
• Magnetic-Field and Strain Engineering of Modulated Transverse Transport in Altermagnetic Topological Materials
• Tunable Enhancement of Magnetization Dynamics by Crystal Cut at Interface Exchange Coupled $\alpha$-Fe${}_2$O${}_3$/NiFe Heterostructures
• Spin current compensation from competing magnon modes in ferrimagnets
• Boltzmann transport theory of magnon-exciton drag