Study on controllability of spin waves using magnonic crystal and its applications

由钇铁石榴石（YIG）组成的磁振子晶体具有电导率的周期性变化，可以控制自旋波的传播特性。研究了磁子晶体自旋波可控性的基本性质。例如，将单个缺陷引入到磁振子晶体中，产生自旋波的局域化模式。将这一现象应用于磁振传感器。提出了提高传感器质量因子的新工艺、纳米级材料和新型器件结构。这些结果发表在期刊和学术研讨会上。

Magnonic crystals comprising yttrium iron garnet (YIG) with the periodic change of conductivity can control the propagation properties of spin waves. We investigated the fundamental properties on the controllability of spin wave by magnonic crystals. For instance, single defect was introduced into the magnonic crystals and generated the localization mode of spin waves. This phenomenon was applied to the magnonic sensors. And also, the novel processes, nano-scale materials, and new device structures to improve the quality factor of the sensors were developed. These results were reported in journals and academic symposiums.