June 11, 2020 Dataset Open Access

Körber, Lukas; Schultheiß, Katrin; Hula, Tobias; Verba, Roman; Faßbender, Jürgen; Kakay, Attila; Schultheiß, Helmut

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    <subfield code="a">Nonlocal stimulation of three-magnon splitting in a magnetic vortex</subfield>
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    <subfield code="a">&lt;p&gt;We present a combined numerical, theoretical and experimental study on stimulated three-magnon splitting in a magnetic disk in the vortex equilibrium state. Our micromagnetic simulations and Brillouin-light-scattering results confirm that three-magnon splitting can be triggered even below threshold by exciting one of the secondary modes by magnons propagating in a waveguide next to the disk. The experiments show that stimulation is possible over an extended range of excitation powers and a wide range of frequencies around the eigenfrequencies of the secondary modes. Rate-equation calculations predict an instantaneous response to stimulation and the possibility to prematurely trigger three-magnon splitting even above threshold in a sustainable manner. These predictions are confirmed experimentally using time-resolved Brillouin-light-scattering measurements and are in a good qualitative agreement with the theoretical results. We believe that the controllable mechanism of stimulated three-magnon splitting could provide a possibility to utilize magnon-based nonlinear networks as hardware for reservoir or neuromorphic computing.&lt;/p&gt;

&lt;p&gt;Here, we briefly describe how the archived data for the publication&amp;nbsp;&amp;quot;Nonlocal stimulation of three-magnon splitting in a magnetic vortex&amp;quot;, submitted&amp;nbsp;to PRL, is structured.&lt;/p&gt;

&lt;p&gt;&amp;quot;rate-equations&amp;quot;&lt;br&gt;
- theoretical data of the temporal evolution of the spin wave modes in Fig. 4&lt;/p&gt;

&lt;p&gt;&amp;quot;micromagnetic-simulation&amp;quot;&lt;br&gt;
- MuMax3 simulation recipes (.go files) and sample-layout masks for the&lt;br&gt;
simulations performed for Fig. 2(a,b,c).&lt;br&gt;
- corresponding power spectra obtained with our &amp;quot;mumax3-pwsp&amp;quot; program&lt;br&gt;
- mode profiles for stimulated and spontaneous splitting (Fig. 1(c) and Fig. 2(d))&lt;br&gt;
- dispersion of the spin waves, calculated by micromagetnic simulation, shown in Fig. 1(b)&lt;/p&gt;

&lt;p&gt;&amp;quot;experiments&amp;quot;&lt;br&gt;
- electron beam microscopy image of the sample&lt;br&gt;
- intensity spectrum of the waveguide, used to calculate the approximate&lt;br&gt;
frequency/wave-vector region where the waveguide is effective (inset in Fig. 1(c))&lt;br&gt;
- non-time-resolved BLS measurements, including spectra, power sweeps, etc. for&lt;br&gt;
Figs 2,3 in &amp;quot;i3MS&amp;quot; folders, in more detail described by &amp;quot;i3MS_V1_KS_logbook.pdf&amp;quot;&lt;br&gt;
- time-resolved BLS measurements, further explained in the corresponding subfolders&lt;br&gt;
&amp;nbsp;&lt;/p&gt;</subfield>
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