Tunable spin-wave nonreciprocity in ferrimagnetic domain-wall channels

作者：Tingting Liu, Shuhong Li, Yunlong Liu, Shuchao Qin, Yang Liu, Wenjun Wang, Minghui Qin · 发表于：Physical review. B./Physical review. B · 年份：2025 · DOI：10.1103/nlgc-rh7s · 被引用次数：1 · 研究领域：Magnetic properties of thin films、Quantum and electron transport phenomena、Topological Materials and Phenomena

The nonreciprocal propagation of spin waves (SWs) offers opportunities for developing novel functional magnonic logic devices, where controllability is crucial for magnetic-signal processing. Domain walls act as natural waveguides due to their magnetic configuration, offering a platform for the in-depth investigation of nonreciprocal SW propagation and its manipulation. In this work, we theoretically and numerically investigate the tunable SW nonreciprocity in ferrimagnetic domain-wall channels under the influence of external field. It is revealed that the Dzyaloshinskii-Moriya interaction exerts dual control over both nonreciprocal SW propagation and spin-splitting phenomena. Moreover, SW nonreciprocity is magnetically tunable, with its sign reversibly switched by inverting the applied field direction, while preserving the host-spin configuration. The orientation of the magnetic field can selectively modify the domain wall structure, offering precise control over SW nonreciprocity. Ultimately, we demonstrate a controllable SW transmission scheme via external magnetic-field modulation, providing critical insights for the design of future magnonic devices.