Electrostatic Dust Modes in Magnetized Dusty Plasma with Crucial Condition of Dust Lower Hybrid Mode

Electrostatic dust modes in magnetized dusty plasma with massive negatively charged dust grains are theoretically investigated using the fluid treatment of plasma. A general dispersion relation for dust modes is derived. Dust-acoustic (DA), ion-acoustic (IA), dust-lower-hybrid (DLH), and ion cyclotron (IC) modes are obtained by applying appropriate plasma conditions to the dispersion relation for the respective dust modes. The phase velocity of the DLH mode is found to be lower than that of the DA, IA, and IC modes. It is also observed that a crucial condition is required to be satisfied to excite DLH mode in laboratory experiment. Behavior of the dust modes is graphically illustrated using the values of appropriate dusty plasma parameters.