Magnonic devices based on spin waves are considered as a new generation of energy-efficient and high-speed devices for storage and processing of information. Our new work entitled “Mode Structures and Damping of Quantized Spin Waves in Ferromagnetic Nanowires” is published in Chinese Physical Letter [Qingwei Fu1, Yong Li2, Lina Chen1, Fusheng Ma2, Haotian Li1, Yongbing Xu3,4, Bo Liu5, Ronghua Liu1*, Chin. Phys. Lett. 37, 087503(2020)]. Congratulations to Mr. Qingwei Fu. In this work, we experimentally demonstrate that three distinct dominated magneto-dynamic modes are excited simultaneously and coexist in a transversely magnetized ferromagnetc wire by combining our home-made CPW broadband FMR spectroscopy and electron beam lithography technique. Besides the uniform FMR mode, the spin-wave well mode, the backward volume magnetostatic spin-wave mode, and the perpendicular standing spin-wave mode are experimentally observed and further confirmed with more detailed spatial profiles by micromagnetic simulation. Furthermore, our experimental approach can also access and reveal damping coefficients of these spin-wave modes. Our results make further insight into the complexity of the dynamical magnetization states in microscale confined FWs, which offers valuable information regarding the excitation of spin waves for the development of magnonic devices. This work is collaborated with Prof. Fusheng Ma’s group, School of Physics and Technology, Nanjing Normal University; Prof. Yongbing Xu in School of Electronic Science and Engineering, Nanjing University, and Dr. Bo Liu in Key Laboratory of Spintronics Materials, Devices and Systems of Zhejiang Province. We especially want to thank Prof. Fusheng Ma and Mr. Yong Li for providing their support in micromagnetic simulation.
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