Handedness-filter and Doppler shift of spin waves in ferrimagnetic domain walls
arXiv:2201.00623 · doi:10.1103/PhysRevB.105.214432
Abstract
Excitation and propagation of spin waves inside magnetic domain walls has received attention because of their potentials in spintronic and communication applications. Besides wave amplitude and frequency, spin-wave has its third character: handedness, whose manipulation is certainly of interest. We propose in this Letter that the handedness of low energy spin-wave excitations can be controlled by tuning the net angular momentum δs in a ferrimagnetic (FiM) domain wall, attributing to the inequivalent magnetic sublattices. The results indicate that the spin-wave dispersion depends on both δs and wave handedness. For a positive (negative) δs, a gapless dispersion is observed for the left-handed (righ-handed) spin waves, while a frequency gap appears for the right-handed (left-handed) spin waves. Thus a FiM wall could serve as a multifold filter of low energy spin-wave in which only spin waves with particular handedness can propagate. Furthermore, the energy consumption loss for spin-wave excitation in the wall is much lower than that inside the domain, while the group velocity is much faster too, demonstrating the advantages of domain walls serving as spin waveguides. Moreover, the current-induced spin-wave Doppler shift in the FiM wall is also revealed, and can be controlled by δs. This work unveils for the first time the interesting spin-wave dynamics in FiM domain walls, benefiting future spin-wave applications.
arXiv commentPage 17, 5 figures
References in corpus (29)
- All-magnonic spin-transfer torque and domain wall propagation
- Experimental prototype of a spin-wave majority gate
- Magnetic texture based magnonics
- Nanoscale neural network using non-linear spin-wave interference
- A spin wave diode
- Antiferromagnetic Domain Wall Motion Induced by Spin Waves
- Experimental observation of the optical spin transfer torque
- Propulsion of a domain wall in an antiferromagnet by magnons
- Concepts of antiferromagnetic spintronics
- Deterministic creation and deletion of a single magnetic skyrmion observed by direct time-resolved X-ray microscopy
- Spin wave excitation in magnetic insulators by spin-transfer torque
- Coherent Terahertz Spin-Wave Emission Associated with Ferrimagnetic Domain Wall Dynamics
- Unidirectional spin-wave channeling along magnetic domain walls of Bloch type
- Eavesdropping on spin waves inside the domain-wall nanochannel via three-magnon processes
- Dynamics of domain walls motion driven by spin-orbit torque in antiferromagnets
- Current-induced spin wave excitation in Pt|YIG bilayer
- Bidirectional spin-wave-driven domain wall motion in antiferromagnetically coupled ferrimagnets
- Ultrafast domain wall motion in ferrimagnets induced by magnetic anisotropy gradient
- Magnon driven skyrmion dynamics in antiferromagnets: The effect of magnon polarization
- Switching between Magnetic Bloch and Néel Domain Walls with Anisotropy Modulations
- Domain wall propagation due to the synchronization with circularly polarized microwaves
- The dynamics of a domain wall in ferrimagnets driven by spin-transfer torque
- Left-handed polarized spin waves in ferromagnets induced by spin-transfer torque
- Asymmetric spin wave dispersion due to a saturation magnetization gradient
- Ultrafast depinning of domain wall in notched antiferromagnetic nanostructures
- Narrow waveguide based on ferroelectric domain wall
- Ultralow-loss domain wall motion driven by magnetocrystalline anisotropy gradient in antiferromagnetic nanowire
- Staggered field driven domain walls motion in antiferromagnetic heterojunctions
- Spin-torque effect on spin wave modes in magnetic nanowires