Characteristics of magnetostatic surface-wave propagation in a layered structure consisting of metals, dielectrics, a semiconductor and y.i.g.

The characteristics of magnetostatic surface waves (m.s.s.w.) propagating in a layered structure consisting of metal plates, dielectrics, a semiconductor and a y.i.g. slab are given. The dispersion relation of the system is derived under the condition of magnetostatic approximation. From the results of computer solution for the dispersion equation, we conclude that a growing m.s.s.w. occurs only when the carrier drift velocity is greater than phase velocity of the m.s.s.w. Also, the influence on the amplifier of a gap between the semiconductor and the y.i.g. slab is discussed.