Magnetic nanocomposites of periodic mesoporous silica: The influence of the silica substrate dimensionality on the inter-particle magnetic interactions.

Highlights: [•] Hematite particles inside porous silica with 2D hexagonal and 3D cubic symmetry. [•] Magnetic properties are strongly affected by the dimensionality of porous matrix. [•] Weak dipolar interactions observed in superparamagnetic hexagonal α-Fe2O3@SBA-15. [•] Strong interactions leading to superspin-glass observed in cubic α-Fe2O3@SBA-16. [ABSTRACT FROM AUTHOR]