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      https://www.ias.ac.in/article/fulltext/boms/013/03/0211-0216

    • Keywords

       

      Nasicon analogue; positron annihilation spectroscopy; cation vacancies; trapping rate

    • Abstract

       

      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.

    • Author Affiliations

       

      V Sreeramalu1 H R Sreepad1 A Chandrashekara1 V Ravindrachary1 S Gopal1

      1. Department of Studies in Physics, University of Mysore, Manasagangotri, Mysore - 570 006, India
    • Dates

       
  • Bulletin of Materials Science | News

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