Phase shift of surface magnetostatic waves propagating in nonuniformly magnetized ferrite films and ferrite-metal structures

It is shown that when surface magnetostatic waves propagate in a ferrite-me tal structure magnetized by a linearly nonuniform field, the phase shift of these waves is many times greater than that accompanying propagation in a ferrite film and also in a ferrite-metal structure magnetized by a uniform field, and may reach extremely high values of tens of thousands of radians. This indicates that ferrite-metal structures magnetized by nonuniform fiel ds are potentially useful for developing microwave shifters. (C) 1999 Ameri can Institute of Physics. [S1063-7850(99)03002-5].