What is a Strontium titanate?

Strontium titanate (chemical formula: SrTiO₃) is an inorganic compound composed of strontium, titanium, and oxygen, and it possesses a perovskite crystal structure. It appears as a colorless or white crystal and is well known for its excellent dielectric and optical properties, making it widely used in electronics and optical materials. Due to its high dielectric constant, strontium titanate is an important material for capacitors and thin-film components. It also serves as a substrate for lasers, optical waveguides, and photonic devices. Historically, it has even been used as a diamond substitute in gemstones.

In recent years, it has gained attention as a substrate material for oxide semiconductors and high-temperature superconductors, playing a significant role in the field of oxide electronics. Its stable crystal structure also makes it suitable for epitaxial thin-film growth. Thus, strontium titanate is considered a high-performance material with promising applications in various advanced technological fields such as optics, electronics, and materials science.

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