• A Chandrashekara

Articles written in Bulletin of Materials Science

• Positron annihilation studies on nasicon analogues containing cation vacancies

Positron annihilation studies were carried out on the Nasicon analogue Na2(La, Al)Zr(PO4)3 compound for three different concentrations (2·2, 2·8 and 5·2 by wt.%) of ZrO2 in the nutrient. Angular correlation study of annihilated photons reveals that the defect concentration is maximum for 2·8 (wt.%) of ZrO2. Further, positron lifetime studies indicate that the positrons are trapped at cation vacancies. Application of a two-state trapping model to this system made it possible to evaluate the lifetime of positrons in the Bloch state and of positrons trapped at cation vacancies.

• # Bulletin of Materials Science

Current Issue
Volume 42 | Issue 6
December 2019

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Posted on July 25, 2019