%0 Conference Paper %K thin films %K spectroscopy %K oxygen %K lanthanum compounds %K Strontium %K Doping (additives) %K Point defects %K Positrons %K Defect structure %K Oxygen vacancy related defects %K Positron annihilation spectroscopy %A T Friessnegg %A B Nielsen %A V.J Ghosh %A A.R Moodenbaugh %A S Madhukar %A S Aggarwal %A D.J Keeble %A E.H Poindexter %A P Mascher %A Ramamoorthy Ramesh %B Materials Research Society Symposium - Proceedings %D 1999 %G eng %P 161-165 %T Defect identification in (La, Sr)CoO3-δ using positron annihilation spectroscopy %V 541 %X Vacancy type defects in bulk La1-xSrxCoO3-δ samples were investigated by positron lifetime spectroscopy. The effects of Sr-doping as well as the effect of oxygen deficiency were determined. Comparing the resolved lifetimes with calculated values permits defect identification. © 1999 Materials Research Society.