Three-magnon splitting and confluence processes for spin-wave excitations in yttrium iron garnet films: Wave vector selective Brillouin light scattering measurements and analysis

César L. Ordóñez-Romero,1,2 Boris A. Kalinikos,1,3 Pavol Krivosik,1,4 Wei Tong,1 Pavel Kabos,5 and Carl E. Patton1 1Department of Physics, Colorado State University, Fort Collins, Colorado 80523, USA 2Universidad Nacional Autónoma de México, Ciudad Universitaria, México D.F., Mexico 3St. Petersburg Electrotechnical University, 197376 St. Petersburg, Russia 4Slovak University of Technology, 81219 Bratislava, Slovak Republic 5National Institute of Standards and Technology, Boulder, Colorado 80305, USA Received 5 February 2009; published 27 April 2009