Magnesium oxide is an excellent single-crystal substrate for thin films of ferromagnetic, photo-electronic, and high Tc superconductor materials.
MSC 108 (OTTO) Magnesium oxide (single crystal substrate), ≥99.9% trace metals basis, <100>, L × W × thickness 10 mm × 10 mm × 0.5 mm - used widely as substrates for various thin film applications.