Lutong Sheng, Mehrdad Elyasi, Jilei Chen, Wenqing He, Yizhan Wang, Hanchen Wang, Hongmei Feng, Yu Zhang, Israa Medlej, Song Liu, Wanjun Jiang, Xiufeng Han, Dapeng Yu, Jean-Philippe Ansermet, Gerrit E W Bauer, Haiming Yu
A leading nonlinear effect in magnonics is the interaction that splits a high-frequency magnon into two low-frequency magnons with conserved linear momentum. Here, we report experimental observation of nonlocal three-magnon scattering between spatially separated magnetic systems, viz. a CoFeB nanowire and a yttrium iron garnet (YIG) thin film. Above a certain threshold power of an applied microwave field, a CoFeB Kittel magnon splits into a pair of counterpropagating YIG magnons that induce voltage signals in Pt electrodes on each side, in excellent agreement with model calculations based on the interlayer dipolar interaction...
January 27, 2023: Physical Review Letters