Low-frequency surface waves in a structured magnetized dusty plasma

It is shown that charged dust particles carrying a considerable proportion of the negative charge of a structured magnetized plasma can lead to low-fr equency electromagnetic surface waves which otherwise do not exist. The wav es are Alfven-like and propagate across the stationary external magnetic fi eld with a frequency below the ion cyclotron but much above the dust cyclot ron frequency. The dispersion characteristics of the modes are obtained and applications to space plasmas discussed.