Felix Kohl
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View article: Hybrid magnonic spintronic system for tunable broadband signal filtering and microwave generation
Hybrid magnonic spintronic system for tunable broadband signal filtering and microwave generation Open
Non-conventional beyond-the-state-of-the-art signal processing schemes require parallelism, scalability, robustness and energy efficiency to meet the demands of complex data-driven applications. With further research, magnonic and spintron…
View article: Modelling spin-wave interference with electromagnetic leakage in micron-scaled spin-wave transducers
Modelling spin-wave interference with electromagnetic leakage in micron-scaled spin-wave transducers Open
Utilization of spin-wave transducers for radio-frequency signal processing provides significant potential due to intrinsic tunability, scalability and nonlinearity. However, such components can exhibit passband ripples diminishing their op…
View article: Identification and minimization of losses in microscaled spin-wave transducers
Identification and minimization of losses in microscaled spin-wave transducers Open
Magnonics is a promising platform for integrated radio frequency (rf) devices, leveraging its inherent non-reciprocity and reconfigurability. However, the efficiency of spin-wave transducers driven by rf-currents remains a major challenge.…
View article: Design rules for low-insertion-loss magnonic transducers
Design rules for low-insertion-loss magnonic transducers Open
We present a computational framework for the design of magnonic transducers, where waveguide antennas generate and pick up spin-wave signals. Our method relies on the combination of circuit-level models with micromagnetic simulations and a…
View article: Design rules for low-insertion-loss magnonic transducers
Design rules for low-insertion-loss magnonic transducers Open
We present a computational framework for the design of magnonic transducers, where waveguide antennas generate and pick up spin-wave signals. Our method relies on the combination of circuit-level models with micromagnetic simulations and a…
View article: Influence of buffer/protective layers on the structural and magnetic properties of SmCo films on Silicon
Influence of buffer/protective layers on the structural and magnetic properties of SmCo films on Silicon Open
Integration of Samarium Cobalt hard magnets on silicon requires buffer/protective layers that can enhance the magnetic properties of the magnet while preserving its structure and chemical composition after post-annealing treatments needed …
View article: Temperature-independent ferromagnetic resonance shift in Bi-doped YIG garnets through magnetic anisotropy tuning
Temperature-independent ferromagnetic resonance shift in Bi-doped YIG garnets through magnetic anisotropy tuning Open
Thin garnet films are becoming central for magnon-spintronics and spin-orbitronics devices as they show versatile magnetic properties together with low magnetic losses. These fields would benefit from materials in which heat does not affec…
View article: Hybrid magnonic-oscillator system
Hybrid magnonic-oscillator system Open
We propose a hybrid magnonic-oscillator system based on the combination of a spin transfer auto-oscillator and a magnonic waveguide to open new perspectives for spin-wave based circuits. The system is composed of a spin transfer oscillator…
View article: Stimulated amplification of propagating spin waves
Stimulated amplification of propagating spin waves Open
Spin-wave amplification techniques are key to the realization of magnon-based computing concepts. We introduce a novel mechanism to amplify spin waves in magnonic nanostructures. Using the technique of rapid cooling, we create a non-equili…
View article: Controlling the Nonlinear Relaxation of Quantized Propagating Magnons in Nanodevices
Controlling the Nonlinear Relaxation of Quantized Propagating Magnons in Nanodevices Open
Relaxation of linear magnetization dynamics is well described by the viscous Gilbert damping processes. However, for strong excitations, nonlinear damping processes such as the decay via magnon-magnon interactions emerge and trigger additi…
View article: Interference of co-propagating Rayleigh and Sezawa waves observed with micro-focused Brillouin light scattering spectroscopy
Interference of co-propagating Rayleigh and Sezawa waves observed with micro-focused Brillouin light scattering spectroscopy Open
We use micro-focused Brillouin light scattering spectroscopy (BLS) to investigate surface acoustic waves (SAWs) in a GaN layer on a Si substrate at GHz frequencies. Furthermore, we discuss the concept of BLS for SAWs and show that the cruc…
View article: Controlling of nonlinear relaxation of quantized magnons in nano-devices
Controlling of nonlinear relaxation of quantized magnons in nano-devices Open
Relaxation of linear magnetization dynamics is well described by the viscous Gilbert damping processes. However, for strong excitations, nonlinear damping processes such as the decay via magnon-magnon interactions emerge and trigger additi…
View article: Parametric Generation of Propagating Spin Waves in Ultrathin Yttrium Iron Garnet Waveguides
Parametric Generation of Propagating Spin Waves in Ultrathin Yttrium Iron Garnet Waveguides Open
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 o…
View article: Parametric Generation of Propagating Spin Waves in Ultrathin Yttrium Iron Garnet Waveguides
Parametric Generation of Propagating Spin Waves in Ultrathin Yttrium Iron Garnet Waveguides Open
Herein, experimental demonstration of the parallel parametric generation of spin waves in a microscaled yttrium iron garnet waveguide with nanoscale thickness is presented. Using Brillouin light scattering microscopy, the parametric excita…