Starting material:

• Fine starting material should be hot-pressed in a piston cylinder apparatus, at high pressure an high temperature, in order to produce a cylindrical sintered sample of few cubic millimeter.
• The recovered sample should be cut in fine slices using a diamond saw or a wire saw.
• The slices should be polished down to 10-15 µm thickness.
• Both sides of the slices should coated with 100 nm of platinum.
• In each slices, 20 to 50 µm diameter samples are cut with a femto-second laser.

Diamond anvil cell loading:

• A laser-drilled rhenium foil is used as gasket.
• Dry MgO fine-grains are squeezed between carbide seats in order to produce 5-10 µm thick flakes that are employed as pressure medium.
• The sample is placed at the center of the gasket hole between the two MgO layers.