Yttrium aluminate (YAlO3, YAP) single crystal is an important crystal matrix material similar to YAG single crystal with excellent optical and physical and chemical properties.
Sapphire substrate is the popular substrates for III-V nitrides, superconductor and magnetic epi film due to less mis-matched lattice and stable chemical and physical properties
Rutile (TiO2) large birefringence, large refractive index, is a method for spectral prism devices such as optical isolators and the polarization beam splitter and a very good material
LSAT with a variety of high-temperature superconductors and oxide materials have good match. LSAT low melting point, with the Czochralski method, the cost is relatively low.