Nonlinear Magnon Scattering Mechanism for Microwave Pumping in Magnetic Films. - Tao Qu; Aneesh Venugopal; James M. Etheridge; William K. Peria; Karthik Srinivasan; Bethanie J. H. Stadler; Paul A. Crowell; R. H. Victora (IEEE Access, 2020)