Recent advances in antiferromagnetic spin dynamics using rare-earth (RE) and transition-metal (TM) ferrimagnets have attracted much interest for spintronic devices with a high speed and density. In this study, the spin wave properties in the magnetostatic backward volume mode and surface mode in RE-TM ferrimagnetic GdxCo1−x films with various composition x are investigated using spin wave spectroscopy. The obtained group velocity and attenuation length are well explained by the ferromagnet-based spin wave theory when the composition of GdxCo1−x is far from the compensation point.
@article{arxiv.1905.12771,
title = {Spin wave propagation in ferrimagnetic $Gd_{x}Co_{1-x}$},
author = {Shinsaku Funada and Tomoe Nishimura and Yoichi Shiota and Shuhei Kasukawa and Mio Ishibashi and Takahiro Moriyama and Teruo Ono},
journal= {arXiv preprint arXiv:1905.12771},
year = {2019}
}