Abstract
The effect of different particle size (50-350 AA) and surface passivation on the magnetic behavior including interactions is studied and correlated in Fe and Co particles. The effect of packing fraction on the above properties is investigated. The DC remanence and Delta M curves are used to calculate various interaction parameters and quantify them, respectively. Strong exchange coupling at the core-shell interface (intra-particle interactions) has a higher contribution to the overall interactions than the interparticle dipolar interactions, especially in smaller particles.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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