Electric Feild Gradient Calculations In Dilute Alloys Copper
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A re-view of the Electric Field Gradient (EFG)tensor has been carried out.The theoretical models proposed by Kohn and vosko(1960) SI and in and Friedel (1960), Sagalyn, Pashkinand Harrison (1961), Sagalyn and Alexander (1977) andPonnambalam and Jena (1931) have been reviewed-The Ponnambaiam and Jena theory (1991) was usedto calculate the EPG tensor tor fourth and fifth rowimpurities in copper.Results of first nearest neighbour (1nn) and secondnearest neighbour (2nn) calculations show goodagreement with experimental values.For fifth row impurities using the value of row=25.6and gamma=1.0; the mean percentage deviation betweencalculated values and experimental values was 4,S percent for Inn For 2nn, using the value of row=34.0,gamma=7.5, a mean percentage deviation or 12.5 per centwas obtained. Where row and gamma are the Bloch enhancementfactor and strain coupling parameter respectively.The3 results show that the Ponnambalam—Jena theoryaccount for the EFG results better than the previoustheories.
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PROJECT DETAILS |
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| Project ID | TH6097 |
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