Institut für Ionenstrahlphysik und Materialforschung, Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstr. 400, Dresden, D-01328, Germany.
Fakultät Physik, Technische Universität Dresden, Dresden, D-01062, Germany.
Nat Commun. 2023 Jul 4;14(1):3954. doi: 10.1038/s41467-023-39452-y.
Magnons are elementary excitations in magnetic materials and undergo nonlinear multimode scattering processes at large input powers. In experiments and simulations, we show that the interaction between magnon modes of a confined magnetic vortex can be harnessed for pattern recognition. We study the magnetic response to signals comprising sine wave pulses with frequencies corresponding to radial mode excitations. Three-magnon scattering results in the excitation of different azimuthal modes, whose amplitudes depend strongly on the input sequences. We show that recognition rates as high as 99.4% can be attained for four-symbol sequences using the scattered modes, with strong performance maintained with the presence of amplitude noise in the inputs.
磁振子是磁性材料中的基本激发态，在大输入功率下会经历非线性多模散射过程。在实验和模拟中，我们表明，受限磁涡旋中磁振子模式之间的相互作用可用于模式识别。我们研究了对包含频率与径向模式激发对应的正弦波脉冲信号的磁响应。三磁振子散射导致不同的角向模式激发，其幅度强烈依赖于输入序列。我们表明，使用散射模式可以达到高达 99.4%的四符号序列识别率，并且在输入中存在幅度噪声的情况下仍能保持良好的性能。
