Generation and characterization of point defects in SrTiO3 and Y3Al5O12

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
Main Authors: F.A. Selim, D. Winarski, C.R. Varney, M.C. Tarun, Jianfeng Ji, M.D. McCluskey
Format: Article
Language:English
Published: Elsevier 2015-01-01
Series:Results in Physics
Subjects:
Complex oxides
Strontium titanate
Garnets
Positron annihilation spectroscopy
IR spectroscopy
Point defects
Online Access:http://www.sciencedirect.com/science/article/pii/S2211379715000030
Description
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.
ISSN:2211-3797

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