Space-Confined Formation of FePt Nanoparticles in Ordered Mesoporous Silica SBA-15


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FePt nanoparticles inside ordered mesoporous silica SBA-15 were synthesized via incipient wetness impregnation and subsequent thermal treatments in reductive atmosphere. The porous matrix is used to prevent sintering and agglomeration during the fcc–FePt to fct–FePt phase transition. According to magnetic measurements and Mössbauer spectroscopic studies, the resulting FePt@SBA-15 composites are ferromagnetic.