Dust ion acoustic solitary waves in a magnetized dusty plasma with anisotropic ion pressure

The influence of anisotropic ion pressure on the dust ion acoustic solitary wave (DIASW) and the double layer (DL) obliquely propagating to a magnetic field are investigated by using the Sagdeev potential. The anisotropic ion pressure is defined by applying the Chew–Goldberger–Low (CGL) theory, p⊥=p⊥0np⊥=p⊥0n and p∥=p∥0n3p∥=p∥0n3, where n is the normalized ion density. The solutions of DIASWs and DLs obliquely propagating to an external magnetic field are obtained in the small amplitude limit. It is found that the perpendicular component of anisotropic ion pressure works differently from that of the parallel component on the DIASWs in a magnetized dusty plasma, deviating from a straight extension of the isotropic pressure effect.