Our paper on PRL shows that superconducting strips on top of thin magnetic films can totally reflect magnons by their diamagnetic response to the magnon stray fields, press release by Huazhong University of Science and Technology
Paper by Tao Yu* and Gerrit E. W. Bauer: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.129.117201
Please see press release at https://mp.weixin.qq.com/s?__biz=MzA4NzExODkwMQ==&mid=2657322921&idx=1&sn=b4f0d522d8d61f334862acfc8756fa7b&chksm=8ba962f3bcdeebe5265673f9cdac5669897220f53d016cdc31a14f2c05ca3400df653876b406&token=2073025210&lang=zh_CN#rd