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

Abstract

Magnonics, which employs spin-waves to transmit and process information, is a promising venue for low-power data processing. One of the major challenges is the local control of the spin-wave propagation path. Here, we introduce the concept of writable magnonics by taking advantage of the highly flexible reconfigurability and rewritability of artificial spin ice systems. Using micromagnetic simulations, we show that globally switchable spin-wave propagation and locally writable spin-wave nanochannels can be realized in a ferromagnetic thin film underlying an artificial pinwheel spin ice. The rewritable magnonics enabled by reconfigurable spin wave nanochannels provides a unique setting to design programmable magnonic circuits and logic devices for ultra-low power applications.

Field angle dependent resonant dynamics of artificial spin ice lattices

“…This has led to a sub-field of spintronics-known as magnonics-where magnons (elementary quanta for spin waves) carry, process, and store the spin information with low losses [2]. Shape-engineered nanostructures and their dipolar coupled arrays are the keys to such emerging wave based technologies [3][4][5][6][7][8]. In comparison to thin films, nanomagnets (NMs) offer excellent opportunities to fine-tune magnetization dynamic responses, which lead to emerging high-frequency magnonic technologies.…”