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Karjalainen, Antti
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Publications (6/6 displayed)
- 2021Defect identification in complex oxides: Positron annihilation spectroscopy of β-Ga₂O₃ and SrTiO₃ ; Rakennevirheiden tunnistus monimutkaisissa puolijohdemateriaaleissa: positroniannihilaatiospektroskopia β-Ga₂O₃:ssa ja SrTiO₃:ssacitations
- 2021Defect identification in complex oxides: Positron annihilation spectroscopy of β-Ga₂O₃ and SrTiO₃
- 2020Ti-Sr antisitecitations
- 2020Ti-Sr antisite : An abundant point defect in SrTiO3citations
- 2019Ga vacancies and electrical compensation in beta-Ga2O3 thin films studied with positron annihilation spectroscopycitations
- 2019Ga vacancies and electrical compensation in β-Ga 2 O 3 thin films studied with positron annihilation spectroscopycitations
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article
Ti-Sr antisite
Abstract
<p>We present a systematic study of the positron lifetime as a function of measurement temperature in strontium titanate (</p><p>SrTiO 3) single crystals grown in different conditions and by different synthesis methods. We combine our experimental results with state-of-the-art theoretical calculations of positron annihilation parameters. We find that the essentially omnipresent 180-190ps lifetime component is most likely the</p><p>Ti</p><p>Sr antisite defect, possibly coupled with one or more oxygen vacancies, supporting the importance of the</p><p>Ti</p><p>Sr antisite related defects in</p><p>SrTiO 3.</p>