Polarization-Selective Excitation of Antiferromagnetic Resonance in Perpendicularly Magnetized Synthetic Antiferromagnets
Polarization-Selective Excitation of Antiferromagnetic Resonance in Perpendicularly Magnetized Synthetic Antiferromagnets
复制标题
垂直磁化合成反铁磁体中反铁磁共振的偏振选择性激发
DOI：
10.1103/physrevapplied.18.014032
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发表时间：
2022
影响因子：
4.6
通讯作者：
Ono Teruo
中科院分区：
文献类型：
--
作者：
Shiota Yoichi;Arakawa Tomonori;Hisatomi Ryusuke;Moriyama Takahiro;Ono Teruo
与铁磁体不同，共线反铁磁体具有两个旋进模式，表现出相反的手征性，这使得能够使用磁振子的偏振自由度。在这项研究中，我们用宽带交叉微带电路实验测量了垂直磁化合成反铁磁体的磁共振极化选择谱。直接检测的右，左手旋进模式的磁共振，理论分析和数值模拟解释的测量结果，通过考虑的垂直磁各向异性和阻尼常数之间的顶部和底部的铁磁层。我们还发现，在两个旋进模之间的简并下，可以激发出不同极化类型的磁激发。我们的工作表明，垂直磁化的合成反铁磁结构提供了一个有吸引力的平台，用于操纵磁振子的极化自由度。
Unlike ferromagnets, collinear antiferromagnets have two precession modes exhibiting opposite chirality, which enables the use of the polarization degree of freedom of magnons. In this study, we experimentally measure the polarization-selective spectra of magnetic resonance in perpendicularly magnetized synthetic antiferromagnets using a wideband crossed microstrip circuit. The magnetic resonances with right-handed and left-handed precession modes are directly detected, and theoretical analysis and numerical simulations explain the measurement results by considering the difference in the perpendicular magnetic anisotropy and damping constant between the top and bottom ferromagnetic layers. We also show that magnetic excitations with different polarization types can be excited under degeneracy between the two precession modes. Our work suggests that perpendicularly magnetized synthetic antiferromagnet structures provide an attractive platform for manipulating the polarization degree of freedom of magnons.