Effect of lattice strain on the Debye-Waller factors of Mg, Zn and Cd |
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Authors: | E Purushotham and N Gopi Krishna |
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Institution: | (1) Physics Research Centre, S.T. Hindu College, Nagercoil, 629 002, India;(2) Department of Physics, Sivanthi Aditanar College, Pillayarpuram, Nagercoil, 629 501, India; |
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Abstract: | Lattice strains in Mg, Zn and Cd powders produced by grinding have been analyzed by X-ray powder diffraction. The lattice
strain (ɛ) and Debye-Waller factor (B) are determined from the half-widths and integrated intensities of the Bragg reflections. In all three cases viz. Mg, Zn and Cd, the Debye-Waller factor is found to increase with the lattice strain. From the correlation between the strain
and effective Debye-Waller factor, the Debye-Waller factors for zero strain have been estimated for Mg, Zn and Cd. The variation
of energy of vacancy formation as a function of lattice strain has been studied. |
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