Study on dispersions of width mode of magneto-static surface wave propagating in periodic multilayer films

The general dispersion relation of width mode of the magneto-static surface wave(MSSW) propagating in YIG multilayer films with finite sample width an d arbitrary parameters is established. The theory includes all the situatio ns of MSSW. dispersion control by multilayer films and is in a better agree ment with the actual situation. The dispersion of MSSW width mode in [(YIG/ GGG)(10)/ metal] periodic multilayer films were numerically investigated by applying the theory. Numerical results showed that the main working made o f MSSW propagating in multilayer YIG films is the first order width mode, t he dispersion of MSSW can be controlled efficiently by the multilayer perio ds and the parameters of each layer. It also is influenced by the sample wi dth.