Satellite Lines in the 59Co Resonance in Cobalt-Nickel Alloys

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Abstract
The distribution of effective field at the 59Co nucleus in alloys of composition CocNi1−c has been studied for c[similar or greater-than]0.93 using an automatic swept frequency spin‐echo NMR spectrometer at 4.2°K. Three satellite lines were observed displaced approximately 7.5 MHz, 15 MHz, and 22 MHz below the main line at 217.4 MHz. The intensities of the satellite lines relative to the main line are in good agreement with the probabilities of configurations with one, two, and three nickela toms respectively in the near‐neighbor shell. A further partially resolved satellite 2 MHz below the main line was also observed and attributed to nuclei with one nickel atom in the next‐nearest neighbor shell and none in the first‐neighbor shell. From these measurements it is concluded that the magnetic disturbance produced by a nickel atom in the cobalt lattice is well localized, in agreement with the neutron‐diffraction measurements.