Synthesis and fabrication of a thin film containing silica-encapsulated face-centered tetragonal FePt nanoparticles

Yu, C.H., Caiulo, N., Lo, C.C.H., Tam, K. and Tsang, S.C. (2006) Synthesis and fabrication of a thin film containing silica-encapsulated face-centered tetragonal FePt nanoparticles. Advanced Materials, 18 (17). pp. 2312-2314. ISSN 0935-9648 doi: 10.1002/adma.200600802

Abstract/Summary

Self-assembly of monodisperse, silica-encapsulated, face-centered tetragonal FePt nanoparticles forms closely packed 2D arrays (see figure). Placing monodisperse FePt nanoparticles in silica nanocapsules allows the transition from a disordered face-centered cubic phase to a ferromagnetic crystalline face-centered tetragonal structure at elevated temperature without severe sintering. These materials are potential candidates for the generation of ultrahigh-density magnetic recording media.