Abstract
Perturbed angular correlation (PAC) spectroscopy of materials containing static defects must often deal with quadrupolar broadening due to randomly distributed defects. The electric field gradient (EFG) due to defects adds to the crystal lattice EFG causing quadrupolar frequencies to differ from site to site in a crystal. We report a simulation study of the static defect EFG using a uniform random distribution of point charges. In this simulation, the distribution of random EFG's is found to depend on the ratio γ of the most probable values of the lattice and random EFG magnitudes, γ=V zz lat/V zz ran. We present fits from the results of the simulations to Hf-doped cubic niobium and Nb-doped tetragonal ZrO2 PAC data. The single scaling parameter fitting for γ=0 provides an unprecedented excellent description for the cubic PAC data.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.