Positron Trap Studies in Zn1-xCuxCr2Se4 Spinels


The results of the positron annihilation measurements and the calculations of the vacancy parameter carried out in single and polycrystals of Zn,,C&Cr2Se4 spinel series are discussed within the framework of a two state trapping model. The single crystal values of the vacancy concentration remain almost constant with increasing copper concentration x. They… (More)


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