The origin of spin current in YIG/nonmagnetic metal multilayers at ferromagnetic resonance

Kang Yun¹, Zhong Hai¹, Hao Runrun¹, Hu Shujun¹, Kang Shishou^{1, †}, Liu Guolei¹, Zhang Yin², Wang Xiangrong^{2, ‡}, Yan Shishen¹, Wu Yong³, Yu Shuyun¹, Han Guangbing¹, Jiang Yong³, Mei Liangmo¹

(color online) Top: The FMR derivative microwave absorption spectra of a YIG/Al(5 nm)/Pt(10 nm) sample when the electrical detection circuit was switched on (red) and off (blue). No MPE-induced magnetized Al was observed. Bottom: No DC-voltage signal in Pt was observed.