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Magnonics, which employs spin-waves to transmit and process information, is apromising venue for low-power data processing. One of the major challenges isthe local control of the spin-wave propagation path. Here, we introduce theconcept of writable magnonics by taking advantage of the highly flexiblereconfigurability and rewritability of artificial spin ice systems. Usingmicromagnetic simulations, we show that globally switchable spin-wavepropagation and the locally writable spin-wave nanochannels can be realized ina ferromagnetic thin film underlying an artificial pinwheel spin ice. Therewritable magnonics enabled by reconfigurable spin wave nanochannels providesa unique setting to design programmable magnonic circuits and logic devices forultra-low power applications.

Writable spin wave nanochannels in an artificial-spin-ice-mediated ferromagnetic thin film