Percolation in a laser plume near the surface of a ternary Al – Cu – MgF2 target

The microwave absorption of a plasma plume formed from variable-composition (Al_yCu_{1– y})_x (MgF₂)_1–x targets and percolation dependences were determined for several weight concentrations of Al in the target. It was shown that the percolation threshold was governed by the total concentration of all metal atoms. An additional-absorption maximum was discovered at the percolation threshold.