Document Type: Research Paper
Department of Physics and Institute for Plasma Research, Kharazmi University, 15719-14911 Tehran, Iran
Department of Physics, Bojnourd Branch, Islamic Azad University, Bojnourd, Iran
In this paper, the problem of small amplitude dust-ion acoustic (DIA) solitary waves is discussed using the reductive perturbation theory in magnetized plasmas consisting of superthermal electrons, inertial ions, and negatively charged stationary dust grains. Presented investigation shows that the effects of external magnetic field and superthermal electrons significantly modify the basic properties of DIA solitary waves, so that an enhancement in the electron superthermality causes to decrease the soliton width. Moreover, when the magnetic field increases, the width of soliton decreases, and in a consequence, it makes the solitary structures be more spiky. In the following, it is found out that the soliton compression and rarefaction are sensitive to the degree of electron superthermality and dust concentration. As well as, the value of obliqueness index has bright effect on adjusting the amplitude of the positive and negative solitary waves. It is expected that the results of this study will give more insight into the DIA dynamics in dusty astrophysical and laboratory plasmas.