Theory of nonreciprocal spin waves excitation in spin-Hall oscillators with Dzyaloshinkii-Moriya interaction
arXiv:1803.05061 · doi:10.1103/PhysRevB.97.134416
Abstract
A two-dimensional analytical model for the description of the excitation of nonreciprocal spin waves by spin current in spin-Hall oscillators in the presence of the interfacial Dzyaloshinskii-Moriya interaction (i-DMI) is developed. The theory allows one to calculate the threshold current for the excitation of spin waves, as well as the frequencies and spatial profiles of the excited spin wave modes. It is found, that the frequency of the excited spin waves exhibits a quadratic red shift with the i-DMI strength. At the same time, in the range of small and moderate values of the i-DMI constant, the averaged wave number of the excited spin waves is almost independent of the i-DMI, which results in a rather weak dependence on the i-DMI of the threshold current of the spin wave excitation. The obtained analytical results are confirmed by the results of micromagnetic simulations.
arXiv comment23 pages,5 figures
References in corpus (19)
- The building blocks of magnonics
- Realization of XNOR and NAND spin-wave logic gates
- Spin-Wave Propagation in the Presence of Interfacial Dzyaloshinskii-Moriya Interaction
- Interfacial Dzyaloshinskii-Moriya interaction in Pt/CoFeB films: effect of the heavy-metal thickness
- Nanowire Spin Torque Oscillator Driven by Spin Orbit Torques
- Spin transfer nano-oscillators
- Experimental evidence of self-localized and propagating spin wave modes in obliquely magnetized current-driven nanocontacts
- Chiral asymmetry of the spin-wave spectra in ultrathin magnetic films
- Asymmetric spin-wave dispersion due to Dzyaloshinskii-Moriya interaction in an ultrathin Pt/CoFeB film
- Nonreciprocal spin-wave channeling along textures driven by the Dzyaloshinskii-Moriya interaction
- Spin wave mode coexistence on the nano-scale: A consequence of the Oersted field induced asymmetric energy landscape
- Identification and selection rules of the spin-wave eigen-modes in a normally magnetized nano-pillar
- Theory of Magnetodynamics Induced by Spin Torque in Perpendicularly Magnetized Thin Films
- Creation of uni-directional spin-wave emitters by utilizing interfacial Dzyaloshinskii-Moriya interaction
- Spin-Hall Nano-oscillator: a micromagnetic study
- Decoherence and mode-hopping in a magnetic tunnel junction-based spin-torque oscillator
- Giant nonreciprocal emission of spin waves in Ta/Py bilayers
- A Dzyaloshinskii-Moriya Anisotropy in Nanomagnets with in-plane Magnetization
- Scalable synchronization of spin-Hall oscillators in out-of-plane field