Generation and characterization of point defects in SrTiO3 and Y3Al5O12

Results in Physics

Jianfeng Ji¹  F.A. Selim¹  D. Winarski¹  C.R. Varney²  M.C. Tarun²  M.D. McCluskey² 

[1] Physics Department, Bowling Green State University, Bowling Green, OH 43403, USA;Physics Department, Washington State University, Pullman, WA 99164, USA;

关键词: Complex oxides;    Strontium titanate;    Garnets;    Positron annihilation spectroscopy;    IR spectroscopy;    Point defects;   

DOI  :  10.1016/j.rinp.2015.01.002

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown