Understanding the Gilbert damping in exchange-coupled multilayer materials is particularly important to develop future fast switching spintronics devices. Here, we report an experimental investigation of temperature-dependent Gilbert damping in [Co/Pd]n/Py multilayer films of varying the number of Co/Pd repetitions by ferromagnetic resonance. The results demonstrate that three independent contributions to the Gilbert damping are identified, namely the intrinsic Gilbert damping, the inhomogeneous linewidth broadening and the two-magnon scattering contribution. Of particular interest, the two-magnon scattering intensity increases as the enlargement of number repetitions of Co/Pd due to the larger pinning effect at the interface between Py and the Co/Pd layers. The Gilbert damping increases monotonically as the temperature decreases from 300K to 50K. Our findings open the door to comprehend the physical origin of the Gilbert damping in ultrathin exchange-coupled multilayer films.
@article{arxiv.1808.06515,
title = {Gilbert damping of [Co/Pd]n/Py multilayer thin films},
author = {Yurui Wei and Yi Huang and Yueyue Liu and Huiliang Wu and Yunxu Ma and Chunlei Zhang and Jianbo Wang and Jiangwei Cao and Qingfang Liu},
journal= {arXiv preprint arXiv:1808.06515},
year = {2019}
}
Comments
the article has some errors, so I hope it can be withdrawal, thank you!