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Electrostatic Wave Features in a Collision Free Magnetized Dusty Plasma

The properties of obliquely propagating dust-ion-acoustic solitary waves (DIASWs) in a collision free magnetized dusty plasma (CFMDP) system (containing nonextensive electron species, inertial negative ion species, Boltzmann distributed positive ion species, and negatively charged static dust grains) have been investigated theoretically. In the present study, we have derived an isotropic nonlinear evolution equation, namely, the Zakharov-Kuznetsov (ZK) equation which admits a localized solitary wave solution for small but finite amplitude limit. It has been found that the basic features (viz. polarity, amplitude, width, etc) of the DIASW s are significantly modified by the effects of the external magnetic field, the degree of obliqueness, electron nonextensivity, negative-to-positive ion number density ratio, electron-to-positive ion temperature ratio, etc.) of the considered CFMDP system. The present investigation can be of relevance to the localized electrostatic solitary structures observed in various space as well as laboratory plasma environments.