A Green Function Estimation of Correction to Vegard's Law for isovalent Substitutional Defects in Alkali Halide Crystals

• Authors: S. Datta Roy (Paul) , S. Das
• Languages of publication: EN

Abstracts

EN

A Green function method is developed for estimation of lattice parameter r(χ) of an AX-BX solid solution over entire composition range (χ=0 to 1). The r(χ) obtained in the present method is different from the value r_{V}(χ) suggested by Vegard's law. We estimated the deviation from Vegard's law, r(χ)-r_{V}(χ), over entire composition range for isovalent substitutional defect in alkali halide crystals. When compared to X-ray diffraction measurements, we find that the deviation is in correct direction, variation of r(χ) with χ is consistent with experiment and the overall agreement is fairly good considering the accuracy of the experiment.

Keywords

EN

61.72.Bb; 61.82.Bg

Discipline

• 61.72.Bb: Theories and models of crystal defects
• 61.82.Bg: Metals and alloys

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2000
• Volume: 97
• Issue: 4
• Pages: 671-679

Dates

published

2000-04

received

1999-10-25

(unknown)

2000-01-25

Contributors

author

S. Datta Roy (Paul)

• Department of Physics, Bethune College, Calcutta 700 006, India

author

S. Das

• Azad Physics Centre, Department of Physics, Maulana Azad College, Calcutta 700 013, India

Identifiers

DOI

10.12693/APhysPolA.97.671