Iron doped strontium titanate (Fe:SrTiO3)

Iron-doped strontium titanate (Fe:SrTiO3) is a complex oxide in which iron elements are doped into the strontium titanate (SrTiO3) crystal. Strontium titanate itself has good electrical properties, such as a high dielectric constant, large electron mobility, and good thermal stability. The introduction of iron elements can further regulate its physical and chemical properties.
Structurally, iron-doped strontium titanate retains the original strontium titanate lattice, but the Fe3+ ions replace a portion of the Ti4+ ions, resulting in the creation of oxygen vacancies in the crystal and forming a defective crystal structure. This structural change significantly impacts its electrical properties.
The physicochemical properties of iron-doped strontium titanate exhibit some unique features. For example, iron doping can reduce the bandgap of strontium titanate, providing it with better optical absorption performance. Simultaneously, iron doping introduces magnetism, granting the originally non-magnetic strontium titanate weak magnetism, which is of great significance for its application in magnetic materials and spintronics.
In terms of applications, iron-doped strontium titanate shows enormous potential in photocatalysis, photovoltaics, and microelectronics. For instance, its excellent optical absorption performance and magnetism make it a potential photocatalyst for hydrogen production from water splitting or decomposition of organic pollutants. Meanwhile, its high electron mobility and excellent thermal stability may also find use in microelectronic devices.

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