Electromagnon resonance at room temperature with gigantic magnetochromism
Electromagnon resonance at room temperature with gigantic magnetochromism
复制标题
具有巨大磁致变色现象的室温电磁振共振
DOI：
10.1103/physrevapplied.9.044033
复制
发表时间：
2018
影响因子：
4.6
通讯作者：
and Y. Tokura
中科院分区：
文献类型：
--
作者：
H. Shishikura;Y. Tokunaga;Y. Takahashi;R. Masuda;Y. Taguchi;Y. Kaneko;and Y. Tokura
磁电（ME）多铁性材料的基本激发特征是具有电活性的磁振子，称为电磁振子。由双线性交换耦合介导的电磁振子共振可能表现出与传统磁振子激发不同的光学性质的强太赫兹光-物质相互作用。在这里，我们报告了强大的电磁共振helimagnetic型六角铁氧体在一个宽的温度范围内，包括室温。此外，这些化合物的灵活的自旋结构上的电磁子的有效的磁场控制被证明，导致共振的产生或湮灭，以及大的共振能量转移。电磁子的这些太赫兹特性增强了多铁性材料中ME耦合驱动的多功能磁光功能，为可能的太赫兹应用以及物质磁态的太赫兹控制铺平了道路。
The elementary excitation characteristic of magnetoelectric (ME) multiferroics is a magnon endowed with electric activity, which is referred to as an electromagnon. The electromagnon resonance mediated by the bilinear exchange coupling potentially exhibits strong terahertz light-matter interaction with optical properties different from the conventional magnon excitation. Here we report the robust electromagnon resonance on helimagnetic-type hexaferrites in a wide temperature range including room temperature. Furthermore, the efficient magnetic field controls of the electromagnon are demonstrated on the flexible spin structure of these compounds, leading to the generation or annihilation of the resonance as well as the large resonance energy shift. These terahertz characteristics of the electromagnon exemplify the versatile magneto-optical functionality driven by the ME coupling in multiferroics, paving a way for possible terahertz applications as well as terahertz control of a magnetic state of matter.