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arXiv · 1808.06515

Gilbert damping of [Co/Pd]n/Py multilayer thin films

Yurui Wei·Yi Huang·Yueyue Liu·Huiliang Wu·Yunxu Ma·Chunlei Zhang·Jianbo Wang·Jiangwei Cao·Qingfang Liu
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Abstract

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.

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Yurui Wei, Yi Huang, Yueyue Liu, Huiliang Wu, Yunxu Ma, Chunlei Zhang, Jianbo Wang, Jiangwei Cao, Qingfang Liu. 2018-08-20. Gilbert damping of [Co/Pd]n/Py multilayer thin films. https://arxiv.org/abs/1808.06515

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