Off-axial focusing of spin-wave lens in the presence of Dzyaloshinskii-Moriya interaction
arXiv:2001.06604 · doi:10.1103/PhysRevB.102.014423
Abstract
We theoretically study the effect of Dzyaloshinskii-Moriya interaction (DMI) on the focusing of a spin-wave lens that is constructed by a circular interface between two magnetic films. We analytically derive the generalized Snell's law in the curved geometry and the position of the focal point which exhibits a peculiar off-axial focusing behavior. We uncover a strong dependence of the focal point on both the material parameters and the frequency of incident spin waves. Full micromagnetic simulations compare well with theoretical predictions. Our findings would be helpful to manipulate spin waves in chiral magnets and to design functional magnonic devices.
arXiv comment5 pages, 5 figures
References in corpus (20)
- The design and verification of Mumax3
- Observation of the Magnon Hall Effect
- Spin-Wave Propagation in the Presence of Interfacial Dzyaloshinskii-Moriya Interaction
- Thickness dependence of the interfacial Dzyaloshinskii-Moriya interaction in inversion symmetry broken systems
- Asymmetric Spin-wave Dispersion on Fe(110): Direct Evidence of Dzyaloshinskii--Moriya Interaction
- Interfacial Dzyaloshinskii-Moriya interaction in Pt/CoFeB films: effect of the heavy-metal thickness
- Effect of lattice geometry on magnon Hall effect in ferromagnetic insulators
- A spin wave diode
- Effect of interfacial intermixing on the Dzyaloshinskii-Moriya interaction in Pt/Co/Pt
- Snell's Law for Spin Waves
- Nonreciprocal spin-wave channeling along textures driven by the Dzyaloshinskii-Moriya interaction
- Spin-Wave Fiber
- Simultaneous control of the Dzyaloshinskii-Moriya interaction and magnetic anisotropy in nanomagnetic trilayers
- Absorbing boundary layers for spin wave micromagnetics
- Eavesdropping on spin waves inside the domain-wall nanochannel via three-magnon processes
- A Luneburg lens for spin waves
- Probing the Dzyaloshinskii-Moriya interaction via the propagation of spin waves in ferromagnetic thin films
- Tunable Snell's law for spin waves in heterochiral magnetic films
- Goos-Hänchen effect of spin waves at heterochiral interfaces
- Spin-Wave Optical Elements: Towards Spin-Wave Fourier Optics