The magnetic form factor of pure cobalt has been studied in the high temperature f.c.c. phase by means of the polarized neutron technique. The amount of aspericity of the 3d-electron has been determined; the eg sub-level population has been found to be p = 0.43 ± 0.01. A comparison of this result with other experimental data on f.c.c. ferfomagnetic Co alloys and with existing theoretical evaluations is discussed.
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