Authors: C.H. Yu, C.C.H. Lo, K.Y. Tam and S.C. Tsang
Affilation: University of Reading, United Kingdom
Pages: 415 - 418
Keywords: exchange spring coupling, nano-magnet, encapsulation
We report the optimization of exchange spring coupling of<br>FePt/Fe3Pt nanocomposites via independently tuning their size and composition by a micro-emulsion method. These nanocomposites are deliberately placed in each silica<br>nano-spheres such that the problem of their sintering is substantially reduced by the presence of silica overlayers during annealing of the mixture. As a result, size tailoring<br>of FePt/Fe3Pt in their L10/L12 phases respectively, can be, for the first time, demonstrated.