Extrinsic scattering induced magnon spin swapping effect in Bi-doped yttrium iron garnetRemoveBin Yang, Peng Wang, Di Wang, Yuben Yang, Yuxuan Mu, Anpeng He, Yuanzhe Tian, Bowen Zheng, Weijie Qin, Kaiyuan Wang, Biying Huang, Jun Du, Baigeng Wang, Xiangang Wan, Qingyu Xu, and Di WuPhys. Rev. B 112, 184425 (2025)