Generation and characterization of point defects in SrTiO3 and Y3Al5O12

Positron annihilation lifetime spectroscopy (PALS) was applied to characterize point defects in single crystals of Y3Al5O12 and SrTiO3 after populating different types of defects by relevant thermal treatments. In SrTiO3, PALS measurements identified Sr vacancy, Ti vacancy, vacancy complexes of Ti–O...

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Bibliographic Details
Published inResults in physics Vol. 5; no. C; pp. 28 - 31
Main Authors Selim, F.A., Winarski, D., Varney, C.R., Tarun, M.C., Ji, Jianfeng, McCluskey, M.D.
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier 2015
Subjects
Complex oxides
Garnets
IR spectroscopy
Point defects
Positron annihilation spectroscopy
Strontium titanate
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Summary:Positron annihilation lifetime spectroscopy (PALS) was applied to characterize point defects in single crystals of Y3Al5O12 and SrTiO3 after populating different types of defects by relevant thermal treatments. In SrTiO3, PALS measurements identified Sr vacancy, Ti vacancy, vacancy complexes of Ti–O (vacancy) and hydrogen complex defects. In Y3Al5O12 single crystals the measurements showed the presence of Al-vacancy, (Al–O) vacancy and Al-vacancy passivated by hydrogen. These defects are shown to play the major role in defining the electronic and optical properties of these complex oxides.
Bibliography:FG02-07ER46386
USDOE
ISSN:2211-3797
2211-3797
DOI:10.1016/j.rinp.2015.01.002