Mesoporous Silica Matrix as a Tool for Minimizing Dipolar Interactions in NiFeâ‚‚Oâ‚„ and ZnFeâ‚‚Oâ‚„ Nanoparticles.

NiFeâ‚‚Oâ‚„ and ZnFeâ‚‚Oâ‚„ nanoparticles have been prepared encased in the MCM (Mobile Composition of Matter) type matrix. Their magnetic behavior has been studied and compared with that corresponding to particles of the same composition and of a similar size (prepared and embedded in amorphous silica or as bare particles). This study has allowed elucidation of the role exerted by the matrix and interparticle interactions in the magnetic behavior of each ferrite system.