In the xrd measurement of the pure and doped materials, it has been observed that few peaks are shifted due to doping. What could be the possible reasons for this X-Ray peak shifting??
Dear Kursheed Perry,
this question is some times addressed here on RG.
So please see for example the answers of similar questions:
https://www.researchgate.net/post/Does_the_doping_process_lead_to_XRD_peaks_shifting_in_2th_direction_or_change_in_the_peaks_intensity
https://www.researchgate.net/post/What_are_all_possible_reasons_for_the_peak_shift_in_X-Ray_Diffraction
Dear K. P
Doping changes the lattice volumes due to difference in atomic radii of dopant and host atoms. A decrease in lattice volumes will shift the XRD peaks to higher diffraction angles and vice versa.
Dear Khursheed Parrey
The position of peaks in XRD patterns depends on dimension of unit cells in the crystalline material. If dimensions of the unit cells change with doping of elements with different sizes, these dimensions will change, resulting in changes in position of XRD peaks.
If the addition of the dopants result in incorporation of strain in the lattice, this causes change in the dimensions of the lattice and hence alters the lattice parameters. The shift in the XRD peaks is the consequence of such alterations (changing the d-spacing, resulting in shift of peaks as according to the deBroglie's relation: 2dsintheta=n lemda).
Better is to you look into the book on XRD by B.D. Cullity.
In addition of strain effect there is the possibility of formation of new oxide or else as well on doping.
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