Journal of the Korean Physical Society

Korean Physical Society (한국물리학회)
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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)
  • Received : 2018.07.25
  • Accepted : 2018.08.08
  • Published : 2018.11.30
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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

Acknowledgement

Supported by : National Research Foundation of Korea (NRF)

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