Abstract
Perturbed Angular Correlations (PAC) technique was applied to measure the electric field gradients (EFG) at 181Ta sites in Hf2Fe. The compound has the cubic structure of the Ti2Ni prototype with two non‐equivalent crystallographic sites for Hf atoms. EFGs for the two sites were measured as a function of the temperature. In addition, one more EFG was observed, which was assigned to the presence of defects in the lattice. The ratio of the measured EFG at the regular lattice sites has been used to assign charges to the ions through a simple calculation using the point charge model and it is shown that the lattice symmetry can explain the very different EFG at both sites.
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