Department of Electrical and Electronic Information Engineering, Toyohashi University of Technology, 1-1 Hibari-Ga-Oka, Tempaku, Toyohashi, Aichi, 441-8580, Japan.
JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.
Sci Rep. 2017 Aug 11;7(1):7898. doi: 10.1038/s41598-017-08114-7.
In the fifty years since the postulation of Moore's Law, the increasing energy consumption in silicon electronics has motivated research into emerging devices. An attractive research direction is processing information via the phase of spin waves within magnonic-logic circuits, which function without charge transport and the accompanying heat generation. The functional completeness of magnonic logic circuits based on the majority function was recently proved. However, the performance of such logic circuits was rather poor due to the difficulty of controlling spin waves in the input junction of the waveguides. Here, we show how Snell's law describes the propagation of spin waves in the junction of a Ψ-shaped magnonic majority gate composed of yttrium iron garnet with a partially metallized surface. Based on the analysis, we propose a magnonic counterpart of a core-cladding waveguide to control the wave propagation in the junction. This study has therefore experimentally demonstrated a fundamental building block of a magnonic logic circuit.
在摩尔定律提出后的五十年里，硅电子学不断增加的能量消耗促使人们研究新兴器件。一个有吸引力的研究方向是通过磁性逻辑电路中的自旋波的相位来处理信息，这种信息处理无需电荷传输和随之产生的热量。基于多数功能的磁性逻辑电路的功能完整性最近得到了证明。然而，由于难以控制波导输入结中的自旋波，因此这种逻辑电路的性能相当差。在这里，我们展示了斯涅尔定律如何描述由部分金属化表面的钇铁石榴石组成的 Ψ 形磁性多数门的结中自旋波的传播。基于分析，我们提出了一种控制结中波传播的磁性类芯包层波导。因此，这项研究实验证明了磁性逻辑电路的基本构建块。
