Abstract

The value, sign and temperature dependence of the magnetic hyperfine field B hf have been determined by time differential perturbed angular correlation measurements for 111Cd impurities in a cubic vacancy defect in ferromagnetic fcc cobalt. The defect is formed by ion implantation of radioactive 111In ions. Comparison to analogous experimental results on B hf for Cd and Sn impurities in fcc cobalt and nickel reveals distinct systematic trends in both value and sign of B hf. These are discussed in the light of results from functional-density theories.

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