Structural Effects on the Magnetic Character of Yttrium-Iron-Garnet Nanoparticles Dispersed in Glass Composites
S Taketomi, Alexander J. Shapiro, Robert D. Shull
We obtained dispersed-nanocrystal/glass composites by impregnating amorphous yttrium iron garnet (YIG) nanoparticles (made by an alkoxide method) into the 49 nanometer diameter pores in the sponge-like structure of porous silica glass (controlled pore glass or CPG) followed by heat treatment of 1000 C and 0.1 hours. Investigation by field emission scanning electron microscopy (FE-SEM) reveals that the CPG fused together 2 m in depth from the surface while its inner core preserved the sponge-like network structure. The particles were independently dispersed with sizes ranging from 20 nm to 40 nm in this fused shell with an average particle density approximately 100 mu-2}. At the surface the particle density appeared to be slightly larger than this value. No particles were found in the inner core. Even in the fused shell, no particles were found in those areas in which the sponge-like structure was preserved. It is concluded that the particles acted as a catalyst to the fusion of the sponge-like glass.
, Shapiro, A.
and Shull, R.
Structural Effects on the Magnetic Character of Yttrium-Iron-Garnet Nanoparticles Dispersed in Glass Composites, Journal of Applied Physics
(Accessed November 30, 2023)