Optical Absorption Study of Ar⁺ Implanted SrTiO₃ Single Crystals

Abstract:

The UV-Visible absorption spectroscopy was performed to study the SrTiO3 (STO) single crystals implanted with the fluences of 1.5×10¹⁵ and 1.875×10¹⁶ Ar⁺/cm². The two absorption peaks at 425 and 742 nm were recorded for the low-fluence implanted samples, while the additional peak at 520 nm was measured only for the high-fluence implanted samples. Through the evolution of the absorption peak with the annealing temperature, the 425, 520, and 742 nm peaks are attributed to the isolated oxygen vacancies, oxygen bivacancies, and oxygen interstitials, respectively. The thermal evolution of absorption spectra reveals that the STO lattice defects have poor thermal stability and disappear completely after 400°C annealing treatment.

• Periodical: Advanced Materials Research (Volumes 989-994)
• Pages: 467-470
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.989-994.467
• Online since: July 2014
• Authors: Yan Shan Wang, Mei Ju Zhang, Yun Duan Gao, De Feng Liu, Ya Wen Chen, Peng Fei Wang*
• Keywords: Absorption Spectrum, Argon Ion Implantation, Strontium Titanate

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