Study of multiferroic domain wall dynamics towards high-speed operation of magnetoferroelectric devices

我研究了磁铁电体中的拓扑结构，如畴壁和skyrmion（自旋旋转物体），称为多铁性，其中磁序和铁电性共存，以快速运行它们。我把注意力集中在一种多铁性物质Cu2OSeO3上，它是skyrmion的宿主，并成功地检测到了高速磁电效应。我详细测量了微波透射率，并观察到微波吸收取决于微波入射方向的现象。这种效应被称为定向二向色性，也是微波领域的首次实验观察。

I studied topological textures such as domain walls and skyrmion (spin-swirling object) in magneto ferroelectrics, called multiferroics, where magnetic order and ferroelectricity coexists, to operate them at a fast rate. I focused on a multiferroic, Cu2OSeO3, which host the skyrmion and succeeded in detecting a high-speed magnetoelectric effect. I measured microwave transmittance in detail and observed a phenomenon in which microwave absorption depends on the incident direction of microwaves. This effect is known as a directional dichroism and a first experimental observation in a microwave regime.