Positron-annihilation studies on nasicon analogs containing cation vacancies

Sreeramalu, V. and Sreepad, H. R. and Chandrashekara, A. and Ravindrachary, V. and Gopal, S. (1990) Positron-annihilation studies on nasicon analogs containing cation vacancies. Bulletin of Materials Science, 13 (3). pp. 211-216.

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Abstract

Positron annihilation studies were carried out on the Nasicon analogue Na2(La, AI)Zr(PO4)3 compound for three different concentrations (2-2, 2"8 and 5.2 by wt.%) of ZrO 2 in the nutrient. Angular correlation study of annihilated photons reveals that the defect concentration is maximum for 2.8 (wt.%) of ZrO 2. Further, positron lifetime studies indicate that the positrons are trapped at cation vacancies. Application of a twostate 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.

Item Type:	Article
Uncontrolled Keywords:	Materials Science; Multidisciplinary
Subjects:	D Physical Science > Material Science
Divisions:	Department of > Physics
Depositing User:	Dr Raju C
Date Deposited:	21 Jan 2021 09:58
Last Modified:	06 Aug 2022 05:37
URI:	http://eprints.uni-mysore.ac.in/id/eprint/15364

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