Data carriers using spin waves in spintronic and magnonic logic devices offer operation at low power consumption and free of Joule heating yet requiring noncollinear spin structures of small sizes. Heterometallic rings can provide such an opportunity due to the controlled spin-wave transmission within such a confined space. Here, we present a series of {Sc_nGd_n} (n = 4, 6, 8) heterometallic rings, which are the first Sc–Ln clusters to date, with tunable magnetic interactions for spin-wave excitations. By means of time- and temperature-dependent spin dynamics simulations, we are able to predict distinct spin-wave excitations at finite temperatures for Sc₄Gd₄, Sc₆Gd₆, and Sc₈Gd₈. Such a new model is previously unexploited, especially due to the interplay of antiferromagnetic exchange, dipole–dipole interaction, and ring topology at low temperatures, rendering the importance of the latter to spin-wave excitations.

中文翻译：

---

{ScnGdn} 异金属环：自旋波激发的可调谐环拓扑

在自旋电子和磁力逻辑器件中使用自旋波的数据载体可在低功耗和无焦耳热的情况下运行，但需要小尺寸的非共线自旋结构。由于在这种有限空间内的受控自旋波传输，异质金属环可以提供这种机会。在这里，我们提出了一系列 {Sc _n Gd _n } ( n = 4, 6, 8) 异金属环，它们是迄今为止第一个 Sc-Ln 簇，具有可调谐的自旋波激发磁相互作用。通过时间和温度相关的自旋动力学模拟，我们能够预测Sc ₄ Gd ₄、Sc _{6在有限温度下的不同自旋波激发}Gd ₆和Sc ₈ Gd ₈。这种新模型以前未被开发，特别是由于反铁磁交换、偶极-偶极相互作用和低温下的环形拓扑的相互作用，使得后者对自旋波激发的重要性。