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http://dx.doi.org/10.3938/jkps.73.1566

Effect of the Gamma-Ray Irradiation on the Electric and Optical Properties of SrTiO3 Single Crystals  

Lee, Y.S. (Department of Physics, Soongsil University)
Lim, Junhwi (Department of Physics, Soongsil University)
Kim, E.Y. (Department of Physics and Research Institute of Physics and Chemistry, Chonbuk National University)
Bu, Sang Don (Department of Physics and Research Institute of Physics and Chemistry, Chonbuk National University)
Publication Information
Journal of the Korean Physical Society / v.73, no.10, 2018 , pp. 1566-1570 More about this Journal
Abstract
We investigated the visible emission property of $SrTiO_3$ (STO) single crystals irradiated with gammy-ray (${\gamma}$-ray) at various total doses up to 900 kGy. The electric and optical absorption properties of the irradiated STO samples were hardly changed with the ${\gamma}$-ray irradiation, compared with those of un-irradiated STO. In contrast, the visible emission near 550 nm increased with the ${\gamma}$-ray dose increasing. While the development of the visible emission was indicative of the increase of oxygen vacancies inside STO by the ${\gamma}$-ray irradiation, the newly generated oxygen vacancies were not significantly harmful to the electric and optical properties of STO. We concluded that the STO single crystal should have a good tolerance against the damage by the ${\gamma}$-ray irradiation.
Keywords
$SrTiO_3$ single crystal; Gamma-ray irradiation; Photoluminescence; Oxygen vacancy;
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