Abstract
The magnetostatic interactions and the disorder in an array of cylindrical Ni particles have been quantified. Room-temperature magnetic force microscopy data were used to determine the dipolar energy/particle for first, second, etc., nearest neighbor particles with external magnetic fields applied along the cylinder axes. An Ising-type model, which includes a distribution of anisotropy energies, accurately replicates the experimental dipolar energy/particle data and the observed hysteresis loops. The technique provides a method to quantify the magnetic properties of a magnetic particle system.
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