Measurement of charge density and mobility in semiconductors in the strong magnetic field

In the semiconductors when the strong constant magnetic field H is applied the nondissipative Hall currents appear and helicon magnetoplasmic waves may be excited. The semiconductor sample becomes partially transparent under these conditions. In the case of resonance the transparency coefficient has maximum or minimum depending of resonance number. For fixed values of H and excitation frequency ω the charge density and mobility may be found. Measurements were conducted in the range of radio frequencies 10-2000 MHz, and magnetic fields 0-32 Tesla for n-InSb and n-Ge