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Study on Defects in Fe-Doped SrTiO3 by Positron Annihilation Lifetime Spectroscopy

  • Chemistry and Physics
  • Published:
Wuhan University Journal of Natural Sciences

Abstract

SrTi1−xFexO3−δ ceramics were prepared using a traditional solid-state reaction method. From X-ray diffraction (XRD) result, we found that the doped Fe3+ dissolved in the lattice, and no secondary phase was observed. Cation vacancies in perovskite oxides were identified via positron annihilation lifetime spectroscopy (PALS) measurements. Undoped and Fe-doped SrTiO3 ceramics and single-crystal SrTiO3 were measured by PALS at room temperature. The results show that the main defects in undoped SrTiO3 ceramics are Ti-related defects, and the isolated Ti vacancy lifetime is about 183.4 ps. With the increase of Fe3+, the concentration of the Ti vacancies decreases accompanied by the appearance of the V″Sr − nV ∙∙o (defect association of Sr vacancies and multiple O vacancies) vacancy defect complexes.

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Authors and Affiliations

  1. Key Laboratory of Nuclear Solid State Physics Hubei Province/School of Physics and Technology, Wuhan University, Wuhan, Hubei, 430072, China

    Yuanyuan Jin, Xiaodong Li, Yao Hao, Jingjing Li & Zhu Wang

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  1. Yuanyuan Jin
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  2. Xiaodong Li
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  3. Yao Hao
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  4. Jingjing Li
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  5. Zhu Wang
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Corresponding author

Correspondence to Zhu Wang.

Additional information

Foundation item: Supported by the National Natural Science Foundation of China (11575129, 11275142)

Biography: JIN Yuanyuan, female, Master candidate, research direction: electronic ceramic materials.

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Jin, Y., Li, X., Hao, Y. et al. Study on Defects in Fe-Doped SrTiO3 by Positron Annihilation Lifetime Spectroscopy. Wuhan Univ. J. Nat. Sci. 24, 417–422 (2019). https://doi.org/10.1007/s11859-019-1415-5

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  • DOI: https://doi.org/10.1007/s11859-019-1415-5

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