Vacancy defect positron lifetimes in strontium titanate

R. A. Mackie; S. Singh; J. Laverock; S. B. Dugdale; D. J. Keeble

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Vacancy defect positron lifetimes in strontium titanate

机译：钛酸锶中空位缺陷正电子的寿命

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The results of positron-annihilation lifetime spectroscopy measurements on undoped, electron-irradiated, and Nb-doped SrTiO_3 single crystals are reported. Perfect lattice and vacancy defect positron lifetimes were calculated using two different first-principles schemes. The Sr-vacancy defect-related positron lifetime was obtained from measurements on Nb-doped, electron-irradiated, and vacuum-annealed samples. Undoped crystals showed a defect lifetime component dominated by trapping to Ti vacancy-related defects.

机译：报道了未掺杂，电子辐照和掺Nb的SrTiO_3单晶的正电子-没寿命光谱测量结果。使用两种不同的第一原理方案计算出完美的晶格和空位缺陷正电子寿命。从对Nb掺杂，电子辐照和真空退火样品的测量中获得了Sr空位缺陷相关的正电子寿命。未掺杂的晶体显示出缺陷寿命组分，该缺陷组分主要是捕获到与Ti空位相关的缺陷。

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《Physical review》 |2009年第4期|103-110|共8页
作者
R. A. Mackie; S. Singh; J. Laverock; S. B. Dugdale; D. J. Keeble;
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Carnegie Laboratory of Physics, School of Engineering, Physics, and Mathematics, University of Dundee, Dundee DD1 4HN, United Kingdom;

Carnegie Laboratory of Physics, School of Engineering, Physics, and Mathematics, University of Dundee, Dundee DD1 4HN, United Kingdom;

H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, United Kingdom;

H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, United Kingdom;

Carnegie Laboratory of Physics, School of Engineering, Physics, and Mathematics, University of Dundee, Dundee DD1 4HN, United Kingdom;

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1. Vacancy defects in strontium titanate: Ab initio calculation [J] . Djermouni M., Zaoui A., Kacimi S., Computational Materials Science . 2010,第4期

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2. The Impact of Acceptor Dopant Magnesium and Oxygen Vacancy Defects on the Lattice of Barium Strontium Titanate [J] . J. Saal, J. Andelm, W. D. Nothwang Integrated Ferroelectrics . 2008,第101期

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7. Vacancy defect positron lifetimes in strontium titanate [O] . MacKie, R. A., Singh, S., Laverock, J., 2009

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8. Vacancy defects in electron irradiated RPV steels studied by positron lifetime [R] . Moser, P. , Li, X. H. , Akamatsu, M. , 1994

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Vacancy defect positron lifetimes in strontium titanate

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