Obliquely propagating dust-acoustic double layer in a magnetized dust plasma

A theoretical investigation has been made of an obliquely dust-acoustic double layer in a magnetized dust plasma which consists of a negatively charged dust fluid, free electrons, and trapped, as well as free, ions. By using Sagdeev's pseudopotential method, we find the obliquely propagating dust-acoustic double layer solution and relation among the amplitude, the inverse scale length, and the obliqueness effects. Furthermore, we show that the obliquely propagating dust-acoustic double layer is a nonlinear extension of a solitary hole having a negative trapping parameter in magnetized dust plasma.