فهرست نشریات علمی دسترسی آزاد ایران

The variations of the electrical conductivity with temperature and electric field of the ternary alloy of gallium, aluminium and arsenic (Al0.75Ga0.25As) with atomic compositions of 99/1 and 98/2 have been investigated. The electrical conductivity of the alloy increases with temperature according to the relation, ? = ?0 exp (??/kT). The activation energy calculated from this empirical relation is 1.42±0.01 eV. The investigation of the variation of electrical conductivity with electric field of the samples reveals that in the low field region (< 1,400 V/m), the conduction is ohmic while in the high field region (> 1,400 V/m), the results are interpreted in terms of space charge limited currents.