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  • 1
    Electronic Resource
    Electronic Resource
    Hyperfine interactions 60 (1990), S. 659-662 
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A study was made of lattice defects in hep Co metal using the technique of perturbed γ-γ angular correlations. Lattice sites of111Cd impurities were characterized by their nuclear magnetic dipole and electric quadrupole interaction frequencies, respectively ωL and ωO. The signal for defect-free substitutional Cd impurities was found to have collinear interactions at 77K, with ωL=438 Mrad/s and ωO=7 Mrad/s. Analysis of measurements after heavy deformation at 100 K and after annealings up to 700 K gave little evidence of thermal trapping of point defects. However, in all spectral measured after deformation, a highly stable defect site with ωL=418 and ωO Mrad/s, and showing collinear interactions, was also observed. It is attributed to a111Cd probe in a stacking fault (SF). Assuming a random distribution of proble atoms and SF's, a SF density of 20% was estimated.
    Type of Medium: Electronic Resource
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