Magnesium oxide is an excellent single-crystal substrate for thin films of ferromagnetic, photo-electronic, and high Tc superconductor materials.
MSC 036 (OTTO) Magnesium oxide (single crystal substrate), ≥99.9% trace metals basis, <111>, L × W × thickness 10 mm × 10 mm × 1 mm Cas 1309-48-4 - used for thermometer and thermoregulator.