The nonlinear properties of magnetoacoustic solitary waves (MASWs) are investigated in magnetized pair ion-electron (PIE) plasmas. The three-fluid collisionless electromagnetic model is considered and the reductive perturbation method is employed to derive the Korteweg-de Vries equation for MASWs in PIE plasmas. It is found that the system under consideration admits compressive solitary structures. The effects of magnetic field intensity, plasma number density and negative ions concentration on MASWs are studied. This study may have relevance to nonlinear wave formation and the propagation of pair ion plasmas containing impurities.

No abstract

The head-on collision of dust magnetoacoustic solitary waves (DMASWs) is studied in magnetized electron–ion–dust plasma. The extended Poincaré–Lighthill–Kuo perturbation method is used to derive the Korteweg de Vries equations for DMASWs in this three-component plasma. The effects of the magnetic field intensity B0, the number of electrons residing on dust surface Zd, the ratio of electron to dust number density δ, the ratio of electron to ion temperature σ, and the ratio of dust acoustic velocity to dust Alfvén velocity β on the phase shift are investigated. It is found that these parameters can significantly influence the phase shifts of colliding DMASWs. The present investigation may be beneficial to understand the interaction between two DMASWs that may occur in plasma with dust impurities situations.