Parametric generation of propagating spin-waves in ultra thin yttrium iron garnet waveguides

Abstract

We present the experimental demonstration of the parallel parametric generation of spin-waves in a microscaled yttrium iron garnet waveguide with nanoscale thickness. Using Brillouin light scattering microscopy, we observe the excitation of the first and second waveguide modes generated by a stripline microwave pumping source. Micromagnetic simulations reveal the wave vector of the parametrically generated spin-waves. Based on analytical calculations, which are in excellent agreement with our experiments and simulations, we prove that the spin-wave radiation losses are the determinative term of the parametric instability threshold in this miniaturized system. The used method enables the direct excitation and amplification of nanometer spin-waves dominated by exchange interactions. Our results pave the way for integrated magnonics based on insulating nano-magnets.

10 pages, 3 figures

References in corpus (19)

• The design and verification of Mumax3
• Reconfigurable nano-scale spin-wave directional coupler
• Experimental prototype of a spin-wave majority gate
• Sub-micrometer yttrium iron garnet LPE films with low ferromagnetic resonance losses
• Excitation of unidirectional exchange spin waves by a nanoscale magnetic grating
• Magnon Valve Effect Between Two Magnetic Insulators
• Spin pinning and spin-wave dispersion in nanoscopic ferromagnetic waveguides
• Spin-wave propagation in ultra-thin YIG based waveguides
• Parametric resonance of magnetization excited by electric field
• Propagating spin waves in nanometer-thick yttrium iron garnet films: Dependence on wave vector, magnetic field strength and angle
• Brillouin light scattering spectroscopy of parametrically excited dipole-exchange magnons
• Backscattering immunity of dipole-exchange magnetostatic surface spin waves
• Frequency-Division Multiplexing in Magnonic Logic Networks Based on Caustic-Like Spin-Wave Beams
• Characterization of spin wave propagation in (111) YIG thin films with large anisotropy
• Non-uniform spin wave softening in 2D magnonic crystals as a tool for opening omnidirectional magnonic band gaps
• Parametrically-stimulated recovery of a microwave signal using standing spin-wave modes of a magnetic film
• Parametrically squeezed states of microwave magnons in yttrium iron garnet films
• Microwave spectral analysis by means of non-resonant parametric recovery of spin-wave signals in a thin magnetic film
• Non-resonant wave front reversal of spin waves used for microwave signal processing

Cited by in corpus (6)

• A magnonic directional coupler for integrated magnonic half-adders
• Integrated magnonic half-adder
• Parametric generation of spin waves in nano-scaled magnonic conduits
• Bose-Einstein Condensation of Nonequilibrium Magnons in Confined Systems
• Complete identification of spin-wave eigenmodes excited by parametric pumping in YIG microdisks
• Spin-transfer-assisted parametric pumping of magnons in yttrium iron garnet