Effects of double-doping on physical properties of V2O3-based alloys

The electrical resistivity of several types of (V_1?x?yM_xM′_y)₂O₃ alloys have been investigated, where M and M′ represent Al, Ga, and 3d transition metal elements. It was found that effects previously obtained by incorporation of M = Al, Cr, may be counteracted by use of M′ = Ti or Ga. On the basis of this information 3-dimensional phase diagrams have been sketched out; several sets of critical points have been encountered. The physical characteristics of (Ti_1?yCr_y)₂O₃ have also been determined; the electrical properties of the alloy y = 0.4 and 0.6 are remarkably similar to those of (V_1?xCr_x)₂O₃ with x = 0.02, 0.03.