Abstract
Based on the magnetohydrodynamics model, an exact arbitrary-amplitude general solution is presented for oblique propagation of solitary excitations in two- and three-component quasineutral magnetoplasmas, adopting the standard pseudopotential approach. It is revealed that the necessary matching criterion of existence of such oblique nonlinear propagations in two- and three-fluid magnetoplasmas possesses global features. These features are examined for the cases of electron-ion and electron-positron-ion magnetoplasmas with diverse equations of state. This study also reveals that for electron-ion magnetoplasmas with plasma frequencies larger than the cyclotron frequency (B0<0.137n0) a critical angle of βcr=arccos[B0/(0.137n0)] exists at which propagation of solitary excitation is not possible. The Coriolis effect on allowed soliton matching condition in rotating magnetoplasmas is also considered as an extension to this work. Current investigation can have important implications for nonlinear wave dynamics in astrophysical as well as laboratory magnetoplasmas.
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