Electrostatic structures associated with dusty electronegative magnetoplasmas

摘要: By using the hydrodynamic equations of positive and negative ions, Boltzmann electron density distribution Poisson equation with stationary dust, a three-dimensional (3D) Zakharov–Kuznetsov (ZK) is derived for small but finite amplitude ion-acoustic waves. However, ZK not appropriate to describe system either at critical plasma compositions or in vicinity compositions. Therefore, modified (MZK) extended (EZK) are derived. The generalized expansion method used analytically solve ZK, MZK EZK equations. A new class solutions that admits train well-separated bell-shaped periodic pulses obtained. In certain conditions, latter degenerates solitary shock wave solutions. effects physical parameters on nonlinear structures examined many environments having different ion species, such as D- F-regions Earth's ionosphere, well laboratory experiments. Numerical analysis revealed profile suffers width modifications due enhancement dust practices, positive-to-negative mass ratio positive/negative cyclotron frequency. Furthermore, necessary conditions both solitons shocks propagation their polarity examined.