Electrical Detection of Antiferromagnetic Dynamics in Gd-Co Thin Films Using 154-GHz Gyrotron Irradiation
Electrical Detection of Antiferromagnetic Dynamics in Gd-Co Thin Films Using 154-GHz Gyrotron Irradiation
复制标题
使用 154 GHz 回旋管辐射对 Gd-Co 薄膜中的反铁磁动力学进行电学检测
DOI：
10.1103/physrevapplied.19.l031003
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发表时间：
2023
影响因子：
4.6
通讯作者：
Moriyama T.
中科院分区：
文献类型：
--
作者：
Funada S.;Ishikawa Y.;Kimata M.;Hayashi K.;Sano T.;Sugi K.;Fujii Y.;Mitsudo S.;Shiota Y.;Ono T.;Moriyama T.
太赫兹（THz）磁化动力学是反铁磁体和铁磁体的关键特性，可以利用太赫兹前沿和自旋电子学。虽然目前大多数太赫兹测量技术是针对块状材料的，其灵敏度依赖于材料的体积，但适用于薄膜的测量技术相当有限。在这项研究中，我们探索并演示了利用一个高功率电磁波源——154 ghz回旋管对铁磁薄膜中反铁磁动力学的电检测。捕获的谐振模式使我们能够描述净角动量补偿周围的特殊磁化动力学。由于回旋管频率可扩展到太赫兹，我们的演示是反铁磁和铁磁薄膜太赫兹测量的里程碑。
Terahertz (THz) magnetization dynamics is a key property of antiferromagnets and ferrimagnets that could harness the THz forefront and spintronics. While most of the present THz measurement techniques are for bulk materials, the sensitivities of which rely on the volume of material, measurement techniques suitable for thin films are quite limited. In this study, we explore and demonstrate the electrical detection of the antiferromagnetic dynamics in ferrimagnetic-thin films by using a 154-GHz gyrotron, which is a high-power electromagnetic wave source. Captured resonant modes allow us to characterize the peculiar magnetization dynamics of-around the net angular momentum compensation. As the gyrotron frequency is scalable up to THz, our demonstration is a milestone toward THz measurements for antiferro- and ferrimagnetic thin films.