Abstract
The magnetization curve at 77 K for uniaxial cobalt particles with easy axes randomly oriented is shown to be in agreement with a theoretical curve calculated for a particle size distribution with a median diameter Dv= 63 Å, σ = 0.3 and anisotropy constant K = 2.8 × 106 erg cm-3. The values are consistent with magnetic measurements at 300 K and microscopy data.
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