Abstract
Abstract The magnetic properties of large iron-oxo clusters stabilized within a shell of organic ligands and silica-coated or polymer-supported iron-oxide nanoparticles have been studied via Mossbauer spectroscopy. We make use of the clusters’ core/shell interface X-ray structural characteristics to shed light on atomic coordination distortions that may be imposed at the particle/matrix interface. Interface strains of 7% or larger are inferred which could induce atomic surface reconstruction and concomitant large surface and strain contributions to the magnetic anisotropy density, producing K ∼10 5 J/m 3 .
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